Hi, I'm experiencing a weird glitch (might not be related to your fine mod, but not sure where else to start inquiring). I made this space plane with 7.5 meter parts and KSP-Interstellar engines, it works fine until the fuel gets low, at which point strange things happen. If I set the fuel to zero in the hangar the plane usually explodes as soon as it loads on the runway (parts get 50 G's of acceleration), sometimes it just gets stuck and can't move (the engines running in atmospheric mode produce thrust and will eventually destroy the plane). Getting stuck happens in space too, I flew a mission starting with full fuel, things worked fine until I tried to burn off my fuel so I could land. Once the fuel levels got to a certain point, the plane got stuck and wouldn't accelerate and would eventually be destroyed from the engine thrust.
Any ideas?