Hi Crzyrndm, great mod! I was running into stability issues at high altitude and speeds before downloading your mod, but now it's flying so much smoother- I can leave the controls entirely and it keeps going. The one issue I'm having right now is the altitude/climb adjustment- once my craft gets to about 15-18km, the PID oscillates between ~-20m/s and 5m/s climb, even when the target climb is anywhere from 5-50m/s. I messed around with the PID parameters but couldn't seem to get it to adjust to a higher attitude to climb. I even kicked in my interplanetary nuclear engine to see if it was just lacking thrust, but it didn't change its oscillations. I realize this post is probably quite vague- if there is any more specific information I can provide I would be happy to do so.