Question about use of Kerbal life support mods. Example, the Ioncross crew support plugin adds O2 and CO2, which can be exchanged and gathered, those are fine in place of supply rules? It eliminates the need to plan to bring in supplies, but adds the need to launch, send, and land the equipment for collect and processing, is that the trade off reasoning for allowing substitution? I assume that this only eliminates the supply cost, not the habitation space requirement. Love the idea, begin mission plan tomorrow morning.