diff --git a/src/app/components/StandardSlot.jsx b/src/app/components/StandardSlot.jsx
index d032fc00..f0e372fc 100644
--- a/src/app/components/StandardSlot.jsx
+++ b/src/app/components/StandardSlot.jsx
@@ -91,7 +91,8 @@ export default class StandardSlot extends TranslatedComponent {
             <div className={'r'}>{formats.round(mass)}{units.T}</div>
 	    <div/>
             <div className={'cb'}>
-                { m.getOptimalMass() ? <div className='l'>{translate('optimal mass')}: {formats.int(m.getOptimalMass())}{units.T}</div> : null }
+                { m.getMinMass() ? <div className='l'>{translate('minimum mass')}: {formats.int(m.getMinMass())}{units.T}</div> : null }
+                { m.getOptMass() ? <div className='l'>{translate('optimal mass')}: {formats.int(m.getOptMass())}{units.T}</div> : null }
                 { m.getMaxMass() ? <div className='l'>{translate('max mass')}: {formats.int(m.getMaxMass())}{units.T}</div> : null }
                 { m.getRange() ? <div className='l'>{translate('range')}: {formats.f2(m.getRange())}{units.km}</div> : null }
                 { m.time ? <div className='l'>{translate('time')}: {formats.time(m.time)}</div> : null }
diff --git a/src/app/shipyard/Calculations.js b/src/app/shipyard/Calculations.js
index f9ab11e4..47b74b7f 100644
--- a/src/app/shipyard/Calculations.js
+++ b/src/app/shipyard/Calculations.js
@@ -10,7 +10,7 @@ import Module from './Module';
  */
 export function jumpRange(mass, fsd, fuel) {
   let fsdMaxFuelPerJump = fsd instanceof Module ? fsd.getMaxFuelPerJump() : fsd.maxfuel;
-  let fsdOptimalMass = fsd instanceof Module ? fsd.getOptimalMass() : fsd.optmass;
+  let fsdOptimalMass = fsd instanceof Module ? fsd.getOptMass() : fsd.optmass;
   return Math.pow(Math.min(fuel === undefined ? fsdMaxFuelPerJump : fuel, fsdMaxFuelPerJump) / fsd.fuelmul, 1 / fsd.fuelpower) * fsdOptimalMass / mass;
 }
 
@@ -24,7 +24,7 @@ export function jumpRange(mass, fsd, fuel) {
  */
 export function fastestRange(mass, fsd, fuel) {
   let fsdMaxFuelPerJump = fsd instanceof Module ? fsd.getMaxFuelPerJump() : fsd.maxfuel;
-  let fsdOptimalMass = fsd instanceof Module ? fsd.getOptimalMass() : fsd.optmass;
+  let fsdOptimalMass = fsd instanceof Module ? fsd.getOptMass() : fsd.optmass;
   let fuelRemaining = fuel % fsdMaxFuelPerJump;  // Fuel left after making N max jumps
   let jumps = Math.floor(fuel / fsdMaxFuelPerJump);
   mass += fuelRemaining;
diff --git a/src/app/shipyard/Module.js b/src/app/shipyard/Module.js
index 930f4a3d..b47dec02 100755
--- a/src/app/shipyard/Module.js
+++ b/src/app/shipyard/Module.js
@@ -210,30 +210,6 @@ export default class Module {
     return this._getModifiedValue('eff');
   }
 
-  /**
-   * Get the maximum mass of this module, taking in to account modifications
-   * @return {Number} the maximum mass of this module
-   */
-  getMaxMass() {
-    return this._getModifiedValue('maxmass');
-  }
-
-  /**
-   * Get the optimal mass of this module, taking in to account modifications
-   * @return {Number} the optimal mass of this module
-   */
-  getOptimalMass() {
-    return this._getModifiedValue('optmass');
-  }
-
-  /**
-   * Get the optimal multiplier of this module, taking in to account modifications
-   * @return {Number} the optimal multiplier of this module
-   */
-  getOptimalMultiplier() {
-    return this._getModifiedValue('optmult');
-  }
-
   /**
    * Get the maximum fuel per jump for this module, taking in to account modifications
    * @return {Number} the maximum fuel per jump of this module