I don't think you are right Ed. He said it balances on the CG just won't sit on all three wheels. I think it is a placement of the gear problem.

Dave, you are right. On a tail dragger you want the CG to be aft of the gear and on a trike you want it in front of the CG. This will make sure the plane sits on the gear when you want it to. If you put the gear aft of CG on a tail dragger the plane will nose over on take off rolls. If you put the gear forward of CG on a trike it will do what you have now, tail will drop when it sits on the ground.

If you know someone with this plane compare the distance from LE to the gear.

MHO