In case anyone wants to use the Procedural Parts TAC:LS tank, here is a MM config to change it to these SI units. I tested it thoroughly by attaching it to a ship and saying, "yep, it works", so use at your own risk @PART[proceduralTankTAC] { @MODULE[TankContentSwitcher] { @TANK_TYPE_OPTION [*],* { @RESOURCE[Food] { @unitsPerKL *= 0.317 } @RESOURCE[Water] { @unitsPerKL *= 1.798 } @RESOURCE[Oxygen] { @unitsPerKL *= 304.27 } @RESOURCE[CarbonDioxide] { @unitsPerKL *= 261.78 } @RESOURCE[Waste] { @unitsPerKL *= 0.56 } @RESOURCE[WasteWater] { @unitsPerKL *= 1.98 } } } }