diff --git a/src/app/components/ModalImport.jsx b/src/app/components/ModalImport.jsx
index b698a9d9..9d5f4ff6 100644
--- a/src/app/components/ModalImport.jsx
+++ b/src/app/components/ModalImport.jsx
@@ -346,6 +346,7 @@ export default class ModalImport extends TranslatedComponent {
         }
       }
     } catch (e) {
+      // console.log(e.stack);
       this.setState({ errorMsg: (typeof e == 'string') ? e : 'Cannot Parse the data!' });
       return;
     }
diff --git a/src/app/components/Modification.jsx b/src/app/components/Modification.jsx
index 6a1464d4..b6a6aea0 100644
--- a/src/app/components/Modification.jsx
+++ b/src/app/components/Modification.jsx
@@ -63,9 +63,24 @@ export default class Modification extends TranslatedComponent {
     let translate = this.context.language.translate;
     let name = this.props.name;
 
+    if (name === 'type') {
+      // We don't show type
+      return null;
+    }
+
+    var symbol;
+    if (name === 'jitter') {
+      symbol = '°';
+    } else if (name !== 'burst') {
+      symbol = '%';
+    }
+    if (symbol) {
+      symbol = ' (' + symbol + ')';
+    }
+
     return (
       <div className={'cb'} key={name}>
-        <div className={'cb'}>{translate(name)}{name === 'jitter' ? ' (°)' : ' (%)'}</div>
+        <div className={'cb'}>{translate(name)}{symbol}</div>
         <NumberEditor className={'cb'} style={{ width: '90%', textAlign: 'center' }} step={0.01} stepModifier={1} decimals={2} value={this.state.value} onValueChange={this._updateValue.bind(this)} />
       </div>
     );
diff --git a/src/app/shipyard/Module.js b/src/app/shipyard/Module.js
index 72a1ec1f..d20a2cf9 100755
--- a/src/app/shipyard/Module.js
+++ b/src/app/shipyard/Module.js
@@ -1,5 +1,6 @@
 import * as ModuleUtils from './ModuleUtils';
 import * as _ from 'lodash';
+import { Modifications } from 'coriolis-data/dist';
 
 /**
  * Module - active module in a ship's buildout
@@ -65,8 +66,20 @@ export default class Module {
   _getModifiedValue(name, additive) {
     let result = this[name] || (additive ? 0 : null); // Additive NULL === 0
     if (result != null) {
-      // Jitter is special, being the only non-percentage value (it is in fact degrees)
-      const modValue = name === 'jitter' ? this.getModValue(name) / 100 : this.getModValue(name) / 10000;
+      const modification = Modifications.modifications[name];
+      if (!modification) {
+        throw 'Unknown modification ' + name;
+      }
+      // We store percentages as decimals, so to get them back we need to divide by 10000.  Otherwise
+      // we divide by 100.  Both ways we end up with a value with two decimal places
+      var modValue;
+      if (modification.type === 'percentage') {
+          modValue = this.getModValue(name) / 10000;
+      } else if (modification.type === 'numeric') {
+          modValue = this.getModValue(name) / 100;
+      } else {
+          modValue = this.getModValue(name);
+      }
       if (modValue) {
         if (additive) {
           result = result + modValue;
@@ -74,7 +87,18 @@ export default class Module {
           result = result * (1 + modValue);
         }
       }
+    } else {
+      if (name === 'burst') {
+        // Burst is special, as if it can not exist but have a modification
+        const modValue = this.getModValue(name) / 100;
+        return modValue;
+      } else if (name === 'burstrof') {
+        // Burst rate of fire is special, as if it can not exist but have a modification
+        const modValue = this.getModValue(name) / 100;
+        return modValue;
+      }
     }
+
     return result;
   }
 
@@ -425,7 +449,7 @@ export default class Module {
   getDps() {
     // DPS is a synthetic value
     let damage = this.getDamage();
-    let rpshot = this.getRoundsPerShot() || 1;
+    let rpshot = this.roundspershot || 1;
     let rof = this.getRoF() || 1;
 
     return damage * rpshot * rof;
@@ -438,7 +462,7 @@ export default class Module {
   getEps() {
     // EPS is a synthetic value
     let distdraw = this.getDistDraw();
-    let rpshot = this.getRoundsPerShot() || 1;
+    let rpshot = this.roundspershot || 1;
     let rof = this.getRoF() || 1;
 
     return distdraw * rpshot * rof;
@@ -451,7 +475,7 @@ export default class Module {
   getHps() {
     // HPS is a synthetic value
     let heat = this.getThermalLoad();
-    let rpshot = this.getRoundsPerShot() || 1;
+    let rpshot = this.roundspershot || 1;
     let rof = this.getRoF() || 1;
 
     return heat * rpshot * rof;
@@ -509,6 +533,7 @@ export default class Module {
     const burst = this.getBurst() || 1;
     const burstRoF = this.getBurstRoF() || 1;
     const intRoF = this._getModifiedValue('rof');
+
     return burst / (((burst - 1)/burstRoF) + 1/intRoF);
   }
 
diff --git a/src/app/shipyard/Ship.js b/src/app/shipyard/Ship.js
index 1a9a386e..3a1acd16 100755
--- a/src/app/shipyard/Ship.js
+++ b/src/app/shipyard/Ship.js
@@ -458,7 +458,7 @@ export default class Ship {
     } else if (name === 'shieldreinforcement') {
       m.setModValue(name, value);
       this.recalculateShieldCells();
-    } else if (name === 'burst' || name === 'clip' || name === 'damage' || name === 'distdraw' || name === 'jitter' || name === 'piercing' || name === 'range' || name === 'reload' || name === 'rof' || name === 'thermload') {
+    } else if (name === 'burst' || name == 'burstrof' || name === 'clip' || name === 'damage' || name === 'distdraw' || name === 'jitter' || name === 'piercing' || name === 'range' || name === 'reload' || name === 'rof' || name === 'thermload') {
       m.setModValue(name, value);
       this.recalculateDps();
       this.recalculateHps();
diff --git a/src/app/utils/CompanionApiUtils.js b/src/app/utils/CompanionApiUtils.js
index c11783ab..91eccc54 100644
--- a/src/app/utils/CompanionApiUtils.js
+++ b/src/app/utils/CompanionApiUtils.js
@@ -279,21 +279,35 @@ function _addModifications(module, modifiers, blueprint, grade) {
   
   var special;
   for (const i in modifiers.modifiers) {
-    // Look up the modifiers to find what we need to do
-    const modifierActions = Modifications.modifierActions[modifiers.modifiers[i].name];
-    const value = modifiers.modifiers[i].value;
+    // Some special modifications
+    if (modifiers.modifiers[i].name === 'mod_weapon_clip_size_override') {
+      // This is a numeric addition to the clip size, but we need to work it out in terms of being a percentage so
+      // that it works the same as other modifications
+      const origClip = module.clip || 1;
+      module.setModValue('clip', ((modifiers.modifiers[i].value  - origClip) / origClip ) * 10000);
+    } else if (modifiers.modifiers[i].name === 'mod_weapon_burst_size') {
+      // This is an absolute number that acts as an override
+      module.setModValue('burst', modifiers.modifiers[i].value * 100);
+    } else if (modifiers.modifiers[i].name === 'mod_weapon_burst_rof') {
+      // For some reason this is a non-normalised percentage (i.e. 12.23% is 12.23 value rather than 0.1223 as everywhere else), so fix that here
+      module.setModValue('burstrof', modifiers.modifiers[i].value * 100);
+    } else {
+      // Look up the modifiers to find what we need to do
+      const modifierActions = Modifications.modifierActions[modifiers.modifiers[i].name];
+      const value = modifiers.modifiers[i].value;
 
-    // Carry out the required changes
-    for (const action in modifierActions) {
-      if (isNaN(modifierActions[action])) {
-        module.setModValue(action, modifierActions[action]);
-      } else {
-        const actionValue = modifierActions[action] * value;
-        let mod = module.getModValue(action) / 10000;
-        if (!mod) {
-          mod = 0;
+      // Carry out the required changes
+      for (const action in modifierActions) {
+        if (isNaN(modifierActions[action])) {
+          module.setModValue(action, modifierActions[action]);
+        } else {
+          const actionValue = modifierActions[action] * value;
+          let mod = module.getModValue(action) / 10000;
+          if (!mod) {
+            mod = 0;
+          }
+          module.setModValue(action, ((1 + mod) * (1 + actionValue) - 1) * 10000);
         }
-        module.setModValue(action, ((1 + mod) * (1 + actionValue) - 1) * 10000);
       }
     }