You should build it either clipped or full length and then order JUST the wing from Sig and construct the other configuration. That way you can swap wings and fly whichever one suits you that day. This way you don't have to buy and build a whole other plane. That may have been what you said in your email but I read as if you would build a whole plane and do it clipped. Sorry, if I just repeated what you said. I assume this can be done. I know it can be done for most of Sig kits so I just assume that the Cub is no different.