Ok so I got my Dad a Sig riser from our local hobby shop. Put the servos in it loaded it up grabbed a hi start and went to the local flying field. Our sailplane expert was there so we let him do the 1st launch. Needless to say he even said it was a hand full. I got on the sticks next and I even noticed it flew worse than any sailplane I've had. The wing isn't warped very straight and well built. WHen we give it full rudder (when I say full I mean full) it doesnt turn. Needless to say it has been put up for the time being. The CG is 1/4-1/2in behind the spar. I'm at a loss for words Ive always heard theyre great planes. Any advice?