I am not sure if you have seen my thread on my Dynaflight Chipmunk build, but there are some pretty good shots of a Chipmunk, that can help you with some of the scale details. Unfortunatly it is the original Chipmunk, not a Super Chipmunk that I believe you are building.

BTW - what is the size of your plane?

Mine is a 90" wing and a 1.2 motor.