If you are flying a stock Twister, the CG should be at 15% Mean Aerodynamic Chord. I'm too lazy to go out to the shop and check, but I think that is 1 5/8 back of the leading edge (maybe 1 3/4).,rather ahead of where it is shown on the plans. If you are flying off grass you will need to move your landing gear as far forward as your CG is from where it is shown. Off blacktop, the plan landing gear position is perfect. If you are loosing tension up high, your leadouts are too far back. Move them forward 1/8 in at a time until the airplane flies to suit you. A Twister with the CG in that position will fly a very nice stunt pattern.

Jim