CGM Chipmunk
ysrcflyer is right on the money.
You definately want to beef up the landing gear mounts to the point of replacing the grooved plywood with hardwood blocks. You also need to beef up the ribs they mount to with some 1/16th inch ply.
I also agree that using two servos for the ailerons is much better then the single servo and bellcrack set up. It's easy to do; just do it like Top Flite does.
Mine is on the way from Korea and I hope to have it flying in January. Wish me luck!
-Bob George