Picked up last year a World Model P51 ARF and I'm getting ready for the build but had a couple questions. I read some of the reviews and went with the Saito 91 SGK engine but I also read that some guys suggest you glass the wing. Is it really necessary and if so a quick tip on how to get this done would help. I've only built 3 other planes, all ARF's, and could use some guidance. Also, read that it asks for high torque servo for the retracts but I have pretty good JR's with about 92oz of torque, is this enough?

Thanks!