Help! My plane keeps falling/drifting

[Magikarp]

So, most probably I'm building my plane wrong in some way but I can't figure out why does my plane keeps falling and drifting to one side or another when stationary in the ground. I've tried everything, readjusting the CG, even putting multiple wheels so it won't fall off, every possible configuration for the parts and money that I have and yet nothing changes.

Any help and insights on why this keeps happening to me would be much appreciated it!

[Derediver]

Hi, my assumption is that during takeoff, the flaps do not rise synchronously, and therefore the plane rolls in one direction or another.

[z3dd4]

I also had this using conventional designs. Now I normally use (mirrowed) 2 wheels at the front, 2 wheels at the back. You can lower them with the tool, because when just adding them they stick out much too far. Keep the front higher than the back. Locks weird, but is working.