Hey, for people with the SDHI mod, http://kerbalspaceprogram.com/sdhi-service-module-system/ I made a module-manager config file that adds a CO2 processor to the service module, some O2 and CO2 tanks, and takes out some of the fuel @PART[SDHI_2.5_ServiceModule] { @mass = 3 @RESOURCE[LiquidFuel] { @amount = 240 @maxAmount = 240 } @RESOURCE[Oxidizer] { @amount = 293.3333333333333 @maxAmount = 293.3333333333333 } MODULE { name = LifeSupportRegeneratorModule INPUT_RESOURCE { name = ElectricCharge rate = 1.6 } INPUT_RESOURCE { name = CO2 rate = 0.0222222222222222 } OUTPUT_RESOURCE { name = Oxygen rate = 0.02 } } MODULE { name = TankPriorityModule Priority = 20 } RESOURCE { name = Oxygen amount = 300 maxAmount = 300 } RESOURCE { name = CO2 amount = 0 maxAmount = 300 } }