RE: Balsa USA 1/3 Scale Sopwith Pup
Fred,
the pics you sent me were great. One thing, since your plane is still in the bones, you may want to consider dumping the aileron setup and mounting your servos out by the control surface. Others can chime in; but I think the general consensus is that tip mounted servos are much superior to that pushrod and bellcrank setup in the plans. Every connection adds a little more slop. Over time that 90 degree bellcrank setup will get real sloppy - ask me how I know.
Steve