ah the bio reactor is not attached no... I thought the micro biome module was the fuel guy... @seanth I do have Biocake, H, and CO2. The resource panel shows all of these are full. I guess the question is; "am I missing a part? ... (BioReactor)?" or will the microbiome do it for me. and if all I need is micro biome why is it not pulling the resources from the supply and consuming it? As for the ship design. I love designing and making ships... This one has been my long term project. I am making it in career mode so I keep adding the new parts in as I get them researched. If you notice all the docked modules are "Probes" with full RCS capability, self sufficient power, reaction wheels etc. so they can be docked, undocked, moved to new spots or new ships. Or even just turned loose in the wild to be used later. I have a "shuttle" that can dock and re-land as well, but it is on the surface right now swapping out crew. I'll post a screen shot of it docked next time I get it up there. on a side note... is the system totally self sufficient? or will I eventually need to resupply one of the resources. and what about CO2, waste, waste water? will the system consume as much as I make? or is there some way to "vent" excess CO2? or is that even necessary? If the CO2 is "full" will things break down? as there is no room to produce more? and if so is there a way to vent the excess to space? same goes for waste and waste water.... If they fill up and this will break the system we need a "blow it out your air lock" idea.