Diablo and others,,,, Try this:

Remove the main landing gear and set the wing in the saddle then gently push the leading edge STRAIGHT DOWN to seat the wing in the saddle. It should go in place and be a snug fit once it is there. After you have determined that it does fit, you should expirementwith the proper angle to get it on and off with the landing gear on. In my case I just leave the plane assembled as I have a VERY tight fit.