Silophant

That did the trick. Thanks, severedsolo and nightingale!

Is there a way to define an existing station as the official kerbin space station? I got the original build contract, completed it, spent a whole bunch of time and funds putting additional parts onto it, and now I keep getting the build contract again. I guess I could detach the science lab part of the station and attach a new one that meets all the other requirements, but I'd rather just edit the save or a cfg if that's not overly difficult.

From what I saw of the stock science lab from Scott Manley's video, The Interstellar and stock science labs should warrant different parts, like Eadrom said above. It would maybe make sense for the "research" function from the Interstellar lab to be moved to the stock lab, leaving the other for antimatter production/fuel reprocessing, but I don't know enough about how modding works to know if that's feasible.

I loved this mod in .21, but haven't been able to use it in .22. I installed it, but I get the "Model Entry purchase required in R&D" message after I unlock them. I've found other threads that say you just have to go to the R&D node with the parts and click on them, but the parts don't show up in the R&D nodes at all, so I have nothing to click on. Any ideas? Edit: Reinstalled KSP and installed Ioncross first, and it works now. Might have been a conflict with the tech tree changer.