RE: extra300 50cc input needed
I have this plane and it is a floater but not hard to land if set up right. I agree with Tom about the balance. You also might want to check your thrust lines. Mine needed one degree of down thrust. The only times I ever had problems like you are seeing was when I had it set up a little tail heavy. Then it would float down the runway till it lost flying speed and then tip stall. After the thrust adjustment and moving the balance a little forward it pretty much lands itself.