diff --git a/package.json b/package.json
index aaf8d19e..5ce7ae59 100644
--- a/package.json
+++ b/package.json
@@ -89,6 +89,7 @@
     "fbemitter": "^2.0.0",
     "lodash": "^4.15.0",
     "lz-string": "^1.4.4",
+    "react-numeric-input": "^2.0.6",
     "react": "^15.0.1",
     "react-dom": "^15.0.1",
     "superagent": "^1.4.0"
diff --git a/src/app/components/ModSlider.jsx b/src/app/components/ModSlider.jsx
new file mode 100644
index 00000000..057742c4
--- /dev/null
+++ b/src/app/components/ModSlider.jsx
@@ -0,0 +1,55 @@
+import React from 'react';
+import { findDOMNode } from 'react-dom';
+import Slider from './Slider';
+
+const MARGIN_LR = 8; // Left/ Right margin
+
+/**
+ * Horizontal Slider for modifications
+ */
+export default class ModSlider extends Slider {
+
+  /**
+   * Constructor
+   * @param  {Object} props   React Component properties
+   */
+  constructor(props) {
+    super(props);
+  }
+
+  /**
+   * Render the slider
+   * @return {React.Component} The slider
+   */
+  render() {
+    let outerWidth = this.state.outerWidth;
+    let { axis, axisUnit, min, max, scale } = this.props;
+
+    let style = {
+      width: '100%',
+      height: axis ? '2.5em' : '1.5em',
+      boxSizing: 'border-box'
+    };
+
+    if (!outerWidth) {
+      return <svg style={style} />;
+    }
+
+    let margin = MARGIN_LR * scale;
+    let width = outerWidth - (margin * 2);
+    let pctPos = width * this.props.percent + margin;
+
+    // TODO add this back in from middle to point
+    // <rect className='primary-disabled' x={margin} y='0.45em' rx='0.15em' ry='0.15em' width={pctPos} height='0.3em' />
+    return <svg onMouseUp={this._up} onMouseEnter={this._enter.bind(this)} onMouseMove={this._move} onTouchEnd={this._up} style={style}>
+      <rect className='primary' style={{ opacity: 0.3, fillOpacity: 0 }} x={margin} y='0.25em' rx='0.3em' ry='0.3em' width={width} height='0.7em' />
+      <circle className='primary' r={margin} cy='0.6em' style={{ strokeWidth: 0, fillOpacity: 1 }} cx={pctPos} />
+      <rect x={margin} width={width} height='100%' fillOpacity='0' style={{ cursor: 'col-resize' }} onMouseDown={this._down} onTouchMove={this._move} onTouchStart={this._down} />
+      {axis && <g style={{ fontSize: '.7em' }}>
+        <text className='primary-disabled' y='3em' x={margin} style={{ textAnchor: 'middle' }}>{min + axisUnit}</text>
+        <text className='primary-disabled' y='3em' x='50%' style={{ textAnchor: 'middle' }}>{(min + max / 2) + axisUnit}</text>
+        <text className='primary-disabled' y='3em' x='100%' style={{ textAnchor: 'end' }}>{max + axisUnit}</text>
+      </g>}
+    </svg>;
+  }
+}
diff --git a/src/app/components/ModificationsMenu.jsx b/src/app/components/ModificationsMenu.jsx
new file mode 100644
index 00000000..c66df4e1
--- /dev/null
+++ b/src/app/components/ModificationsMenu.jsx
@@ -0,0 +1,208 @@
+import React from 'react';
+import { findDOMNode } from 'react-dom';
+import NumericInput from 'react-numeric-input';
+import TranslatedComponent from './TranslatedComponent';
+import { stopCtxPropagation } from '../utils/UtilityFunctions';
+import cn from 'classnames';
+import { MountFixed, MountGimballed, MountTurret } from './SvgIcons';
+import { Modifications } from 'coriolis-data/dist';
+import ModSlider from './ModSlider';
+
+const PRESS_THRESHOLD = 500; // mouse/touch down threshold
+
+/**
+ * Modifications menu
+ */
+export default class ModificationsMenu extends TranslatedComponent {
+
+  static propTypes = {
+    ship: React.PropTypes.object.isRequired,
+    m: React.PropTypes.object.isRequired,
+    onChange: React.PropTypes.func.isRequired
+  };
+
+  /**
+   * Constructor
+   * @param  {Object} props   React Component properties
+   * @param  {Object} context React Component context
+   */
+  constructor(props, context) {
+    super(props);
+    this.state = this._initState(props, context);
+  }
+
+  /**
+   * Initiate the list of modifications
+   * @param  {Object} props   React Component properties
+   * @param  {Object} context React Component context
+   * @return {Object}         list: Array of React Components
+   */
+  _initState(props, context) {
+    let translate = context.language.translate;
+    let formats = context.language.formats;
+    let { m  } = props;
+    let list = [];
+
+    for (let modId of Modifications.validity[m.grp]) {
+      list.push(<div className={'cb'} key={modId}>
+		  <div className={'l'}>{translate(Modifications.modifiers[modId].name)}</div>
+		  <span className={'r'}>{formats.pct(m.getModValue(modId) || 0)}</span>
+		  <ModSlider className={'cb'} percent={this._getSliderPercent(modId)} onChange={this._updateValue.bind(this, modId)} />
+                </div>);
+    }
+		  //<NumericInput className={'r'} min={-100} max={100} step={0.1} precision={2} value={m.getModValue(modId) * 100} onChange={this._updateValue.bind(this, modId)} />
+
+    return { list };
+  }
+
+  /**
+   * Generate React Components for Module Group
+   * @param  {Function} translate   Translate function
+   * @param  {Objecy} mountedModule Mounted Module
+   * @param  {Funciton} warningFunc Warning function
+   * @param  {number} mass          Mass
+   * @param  {function} onSelect    Select/Mount callback
+   * @param  {string} grp           Group name
+   * @param  {Array} modules        Available modules
+   * @return {React.Component}      Available Module Group contents
+   */
+  _buildGroup(translate, mountedModule, warningFunc, mass, onSelect, grp, modules) {
+    let prevClass = null, prevRating = null;
+    let elems = [];
+
+    for (let i = 0; i < modules.length; i++) {
+      let m = modules[i];
+      let mount = null;
+      let disabled = m.maxmass && (mass + (m.mass ? m.mass : 0)) > m.maxmass;
+      let active = mountedModule && mountedModule === m;
+      let classes = cn(m.name ? 'lc' : 'c', {
+        warning: !disabled && warningFunc && warningFunc(m),
+        active,
+        disabled
+      });
+      let eventHandlers;
+
+      if (disabled || active) {
+        eventHandlers = {};
+      } else {
+        let showDiff = this._showDiff.bind(this, mountedModule, m);
+        let select = onSelect.bind(null, m);
+
+        eventHandlers = {
+          onMouseEnter: this._over.bind(this, showDiff),
+          onTouchStart: this._touchStart.bind(this, showDiff),
+          onTouchEnd: this._touchEnd.bind(this, select),
+          onMouseLeave: this._hideDiff,
+          onClick: select
+        };
+      }
+
+      switch(m.mount) {
+        case 'F': mount = <MountFixed className={'lg'} />; break;
+        case 'G': mount = <MountGimballed className={'lg'}/>; break;
+        case 'T': mount = <MountTurret className={'lg'}/>; break;
+      }
+
+      if (i > 0 && modules.length > 3 && m.class != prevClass && (m.rating != prevRating || m.mount) && m.grp != 'pa') {
+        elems.push(<br key={'b' + m.grp + i} />);
+      }
+
+      elems.push(
+        <li key={m.id} className={classes} {...eventHandlers}>
+          {mount}
+          {(mount ? ' ' : '') + m.class + m.rating + (m.missile ? '/' + m.missile : '') + (m.name ? ' ' + translate(m.name) : '')}
+        </li>
+      );
+      prevClass = m.class;
+      prevRating = m.rating;
+    }
+
+    return <ul key={'modules' + grp} >{elems}</ul>;
+  }
+
+
+  /**
+   * Touch Start - Show diff after press, otherwise treat as tap
+   * @param  {Function} showDiff diff tooltip callback
+   * @param  {SyntheticEvent} event Event
+   */
+  _touchStart(showDiff, event) {
+    event.preventDefault();
+    let rect = event.currentTarget.getBoundingClientRect();
+    this.touchTimeout = setTimeout(showDiff.bind(this, rect), PRESS_THRESHOLD);
+  }
+
+  /**
+   * Touch End - Select module on tap
+   * @param  {Function} select Select module callback
+   * @param  {SyntheticEvent} event Event
+   */
+  _touchEnd(select, event) {
+    event.preventDefault();
+    if (this.touchTimeout !== null) {  // If timeout has not fired (been nulled out) yet
+      select();
+    }
+  }
+
+  /**
+   * Scroll to mounted (if it exists) module group on mount
+   */
+  componentDidMount() {
+    if (this.groupElem) {  // Scroll to currently selected group
+      findDOMNode(this).scrollTop = this.groupElem.offsetTop;
+    }
+  }
+
+  /**
+   * Update state based on property and context changes
+   * @param  {Object} nextProps   Incoming/Next properties
+   * @param  {Object} nextContext Incoming/Next conext
+   */
+  componentWillReceiveProps(nextProps, nextContext) {
+    this.setState(this._initState(nextProps, nextContext));
+  }
+
+
+  /**
+   * Update modification given a value.
+   * @param {Number} modId The ID of the modification
+   * @param {Number} value The value to set, in the range [0,1]
+   */
+  _updateValue(modId, value) {
+    let scaledValue = (value - 0.5) * 2;
+    let m = this.props.m;
+    let ship = this.props.ship;
+    ship.setModification(m, modId, scaledValue);
+    this.props.onChange();
+  }
+
+  /**
+   * Obtain slider value from a modification.
+   * @param {Number} modId The ID of the modification
+   * @return {Number} value The value of the slider, in the range [0,1]
+   */
+  _getSliderPercent(modId) {
+    let m = this.props.m;
+    if (m.getModValue(modId)) {
+      return (m.getModValue(modId) / 2) + 0.5;
+    }
+    return 0.5;
+  }
+
+  /**
+   * Render the list
+   * @return {React.Component} List
+   */
+  render() {
+    return (
+      <div
+          className={cn('select', this.props.className)}
+          onClick={(e) => e.stopPropagation() }
+          onContextMenu={stopCtxPropagation}
+      >
+        {this.state.list}
+      </div>
+    );
+  }
+
+}
diff --git a/src/app/components/ShipSummaryTable.jsx b/src/app/components/ShipSummaryTable.jsx
index 7ebc8163..84aee6b8 100644
--- a/src/app/components/ShipSummaryTable.jsx
+++ b/src/app/components/ShipSummaryTable.jsx
@@ -92,8 +92,8 @@ export default class ShipSummaryTable extends TranslatedComponent {
             <td className={sgClassNames}>{sgRecover}</td>
             <td className={sgClassNames}>{sgRecharge}</td>
             <td>{ship.hullMass} {u.T}</td>
-            <td>{round(ship.unladenMass)} {u.T}</td>
-            <td>{round(ship.ladenMass)} {u.T}</td>
+            <td>{int(ship.unladenMass)} {u.T}</td>
+            <td>{int(ship.ladenMass)} {u.T}</td>
             <td>{round(ship.cargoCapacity)} {u.T}</td>
             <td>{round(ship.fuelCapacity)} {u.T}</td>
             <td>{round(ship.unladenRange)} {u.LY}</td>
diff --git a/src/app/components/Slot.jsx b/src/app/components/Slot.jsx
index f0d64ccb..0453e23a 100644
--- a/src/app/components/Slot.jsx
+++ b/src/app/components/Slot.jsx
@@ -2,6 +2,7 @@ import React from 'react';
 import TranslatedComponent from './TranslatedComponent';
 import cn from 'classnames';
 import AvailableModulesMenu from './AvailableModulesMenu';
+import ModificationsMenu from './ModificationsMenu';
 import { diffDetails } from '../utils/SlotFunctions';
 import { wrapCtxMenu } from '../utils/UtilityFunctions';
 
@@ -94,6 +95,12 @@ export default class Slot extends TranslatedComponent {
       />;
     }
 
+    if (this.props.selected) {
+      menu = <ModificationsMenu
+        className={this._getClassNames()}
+        m={m}
+      />;
+    }
     // TODO: implement touch dragging
 
     return (
diff --git a/src/app/components/StandardSlot.jsx b/src/app/components/StandardSlot.jsx
index 55d554fb..1d15d6f4 100644
--- a/src/app/components/StandardSlot.jsx
+++ b/src/app/components/StandardSlot.jsx
@@ -4,8 +4,8 @@ import TranslatedComponent from './TranslatedComponent';
 import { jumpRange } from '../shipyard/Calculations';
 import { diffDetails } from '../utils/SlotFunctions';
 import AvailableModulesMenu from './AvailableModulesMenu';
+import ModificationsMenu from './ModificationsMenu';
 import { ListModifications } from './SvgIcons';
-import Slider from './Slider';
 import { Modifications } from 'coriolis-data/dist';
 import { stopCtxPropagation } from '../utils/UtilityFunctions';
 
@@ -32,7 +32,7 @@ export default class StandardSlot extends TranslatedComponent {
   render() {
     let { termtip, tooltip } = this.context;
     let { translate, formats, units } = this.context.language;
-    let { modules, slot, warning, onSelect, ladenMass, ship } = this.props;
+    let { modules, slot, warning, onSelect, onChange, ladenMass, ship } = this.props;
     let m = slot.m;
     let classRating = m.class + m.rating;
     let menu;
@@ -50,13 +50,22 @@ export default class StandardSlot extends TranslatedComponent {
       />;
     }
 
+    if (this.props.selected) {
+      menu = <ModificationsMenu
+        className='standard'
+	onChange={onChange}
+        ship={ship}
+        m={m}
+      />;
+    }
+
     return (
       <div className={cn('slot', { selected: this.props.selected })} onClick={this.props.onOpen} onContextMenu={stopCtxPropagation}>
         <div className={cn('details-container', { warning: warning && warning(slot.m) })}>
           <div className={'sz'}>{slot.maxClass}</div>
           <div>
             <div className='l'>{classRating} {translate(m.grp == 'bh' ? m.grp : m.name || m.grp)}</div>
-            <div className={'r'}>{m.getMass() || m.fuel || 0}{units.T}</div>
+            <div className={'r'}>{formats.round1(m.getMass()) || m.fuel || 0}{units.T}</div>
 	    <div/>
             <div className={'cb'}>
                 { m.grp == 'bh' && m.name ? <div className='l'>{translate(m.name)}</div> : null }
@@ -70,46 +79,12 @@ export default class StandardSlot extends TranslatedComponent {
                 { m.weaponcapacity ? <div className='l'>{translate('WEP')}: {m.weaponcapacity}{units.MJ} / {m.weaponrecharge}{units.MW}</div> : null }
                 { m.systemcapacity ? <div className='l'>{translate('SYS')}: {m.systemcapacity}{units.MJ} / {m.systemrecharge}{units.MW}</div> : null }
                 { m.enginecapacity ? <div className='l'>{translate('ENG')}: {m.enginecapacity}{units.MJ} / {m.enginerecharge}{units.MW}</div> : null }
-	        { validMods.length > 0 ? <div className='r' ><button onClick={this._showModificationsMenu.bind(this, m)} onContextMenu={stopCtxPropagation} onMouseOver={termtip.bind(null, 'modifications')} onMouseOut={tooltip.bind(null, null)}><ListModifications /></button></div> : null }
             </div>
           </div>
         </div>
         {menu}
       </div>
     );
+	        //{ validMods.length > 0 ? <div className='r' ><button onClick={this._showModificationsMenu.bind(this, m)} onContextMenu={stopCtxPropagation} onMouseOver={termtip.bind(null, 'modifications')} onMouseOut={tooltip.bind(null, null)}><ListModifications /></button></div> : null }
   }
-  // {validMods.length > 0 ? <div className='cb' ><Slider onChange={this._updateSliderValue.bind(this)} min={-1} max={1} percent={this._getSliderValue()}/></div> : null }
-
-  _showModificationsMenu(m, e) {
-    let validMods = m == null ? [] : (Modifications.validity[m.grp] || []);
-    // TODO set up the modifications
-    e.stopPropagation();
-  }
-
-  /**
-   * Update power usage modification given a slider value.
-   * Note that this is a temporary function until we have a slider section
-   * @param {Number} value The value of the slider
-   */
-  _updateSliderValue(value) {
-    let m = this.props.slot.m;
-    if (m) {
-      m.setModValue(2, value * 2 - 1);
-    }
-    this.props.onChange();
-  }
-
-  /**
-   * Obtain slider value from a power usage modification.
-   * Note that this is a temporary function until we have a slider section
-   * @return {Number} value The value of the slider
-   */
-  _getSliderValue() {
-    let m = this.props.slot.m;
-    if (m && m.getModValue(2)) {
-      return (m.getModValue(2) + 1) / 2;
-    }
-    return 0;
-  }
-
 }
diff --git a/src/app/pages/OutfittingPage.jsx b/src/app/pages/OutfittingPage.jsx
index e4ee5633..839c6b00 100644
--- a/src/app/pages/OutfittingPage.jsx
+++ b/src/app/pages/OutfittingPage.jsx
@@ -284,9 +284,9 @@ export default class OutfittingPage extends Page {
         canSave = (newBuildName || buildName) && code !== savedCode,
         canRename = buildName && newBuildName && buildName != newBuildName,
         canReload = savedCode && canSave,
-        hStr = ship.getHardpointsString(),
-        sStr = ship.getStandardString(),
-        iStr = ship.getInternalString();
+        hStr = ship.getHardpointsString() + '.' + ship.getModificationsString(),
+        sStr = ship.getStandardString() + '.' + ship.getModificationsString(),
+        iStr = ship.getInternalString() + '.' + ship.getModificationsString();
 
     return (
       <div id='outfit' className={'page'} style={{ fontSize: (sizeRatio * 0.9) + 'em' }}>
diff --git a/src/app/shipyard/Module.js b/src/app/shipyard/Module.js
index d3377e6b..3af7768a 100755
--- a/src/app/shipyard/Module.js
+++ b/src/app/shipyard/Module.js
@@ -82,13 +82,13 @@ export default class Module {
   }
 
   /**
-   * Get the mass of this module, taking in to account modifications
-   * @return {Number} the mass of this module
+   * Get the integrity of this module, taking in to account modifications
+   * @return {Number} the integrity of this module
    */
-  getMass() {
+  getIntegrity() {
     let result = 0;
-    if (this.mass) {
-      result = this.mass;
+    if (this.health) {
+      result = this.health;
       if (result) {
         let mult = this.getModValue(3);
         if (mult) { result = result * (1 + mult); }
@@ -98,13 +98,13 @@ export default class Module {
   }
 
   /**
-   * Get the integrity of this module, taking in to account modifications
-   * @return {Number} the integrity of this module
+   * Get the mass of this module, taking in to account modifications
+   * @return {Number} the mass of this module
    */
-  getIntegrity() {
+  getMass() {
     let result = 0;
-    if (this.health) {
-      result = this.health;
+    if (this.mass) {
+      result = this.mass;
       if (result) {
         let mult = this.getModValue(4);
         if (mult) { result = result * (1 + mult); }
diff --git a/src/app/shipyard/Ship.js b/src/app/shipyard/Ship.js
index 5123f087..50d4018f 100755
--- a/src/app/shipyard/Ship.js
+++ b/src/app/shipyard/Ship.js
@@ -347,7 +347,6 @@ export default class Ship {
     return this.serialized.hardpoints;
   }
 
-
   /**
    * Serializes the modifications to a string
    * @return {String} Serialized modifications 'code'
@@ -403,6 +402,37 @@ export default class Ship {
     return this;
   }
 
+  /**
+   * Set a modification value
+   * @param {Object} m The module to change
+   * @param {Object} mId The ID of the modification to change
+   * @param {Number} value The new value of the modification
+   */
+  setModification(m, mId, value) {
+    // Handle special cases
+    if (mId == 1) {
+      // Power generation
+      m.setModValue(mId, value);
+      this.updatePower();
+    } else if (mId == 2) {
+      // Power usage
+      m.setModValue(mId, value);
+      this.updatePower();
+    } else if (mId == 4) {
+      // Mass
+      let oldMass = m.getMass();
+      m.setModValue(mId, value);
+      let newMass = m.getMass();
+      this.unladenMass = this.unladenMass - oldMass + newMass;
+      this.ladenMass = this.ladenMass - oldMass + newMass;
+      this.updateTopSpeed();
+      this.updateJumpStats();
+    } else {
+      // Generic
+      m.setModValue(mId, value);
+    }
+  }
+
   /**
    * Builds/Updates the ship instance with the ModuleUtils[comps] passed in.
    * @param {Object} comps Collection of ModuleUtils used to build the ship
diff --git a/src/less/app.less b/src/less/app.less
index b4a5443f..7f4564ec 100755
--- a/src/less/app.less
+++ b/src/less/app.less
@@ -163,4 +163,4 @@ footer {
     float: right;
     text-align: right;
   }
-}
\ No newline at end of file
+}