Sandpiper

I have a heavily modded install of KSP because of RSS/RO/RP-0. When I launch a plane from the SPH the wheels sink into the runway, the plane can move forward but it's impossible to take off because it hits bumps in the surface below. This is a screenshot of what is happening. I have found similar problems on the forum, but those are all with rover wheels that were assembled in the wrong rotation or wheels from a mod. I'm using stock plane wheels. I also found another thread that blames an out of date Firespitter.dll file. I compared the DLL file from my install with the one in the latest release on github (7.1.5) and they are binary identical, so this is also not the issue. How can I solve this? My installed mods:

It's a little counterintuitive: at a higher altitude your craft will be occluded by the planet for a smaller portion of the orbit, but the velocity will be a lot slower, so the total time spent in darkness will be higher. The altitude is in kilometers. Both axes of the graph have a logarithmic scale. The dotted lines are orbit altitudes where you could get in the sphere of influence of a moon ("unstable"). The fat dot is the exact altitude for a stationary orbit, where the orbiting velocity equals the surface velocity of the planet.

I made this graph a while back that shows the maximum darkness time in circular orbits for all KSP planets and moons.

I combined all these charts into one. I hope someone finds this useful.