Actually I did the lander docking with RPM, it's still quite hard EDIT: I've decided to try the latest version, with KIS. I notice still that removing the KIS/KAS modules increase performance a good bit. Interesting? just checked, doubles FPS (from 20). hm.. more testing below: KAS containers, the 2.5 m ones or something, do not lower fps. Benchmarks: Probe core: 75 FPS Habitability: 75 FPS Science Lab: 75 FPS Habitat Module: 40 FPS (retracted) 80 FPS (deployed) So far, it seems the Habitat module is laggy when retracted, but when deployed it is fine.