RE: Yet Another CG Post ...
I agree with MinnFlyer, while balance is important, it's not thatcritical. We have a youth program with several LT-40's. We check the balance by picking the plane up with our fingertips under the main spar, if the nose tips slightly down (slightly is key) it's good to go. And even though we haven't specifically used MinnFlyer's three point test (we convert most of the LT's to tail draggers) the "feel" of the plane on landing tells us if it's right.