ORIGINAL: Stickbuilder
I have done these mods, and also have cleaned up the front of the fuse as well. I have even tried eliptical wingtips, and I really did like this mod. (also done all the above to the 4*120 as well) I did not just increase the length of the rudder, but added to the height as well, and wound up with the rudder looking something like the one found on the extra series. Same with the elevators. Did it help? YES, YES, and YES. Be careful that you feel the model out before going to high rates at low altitude. You can make the bird, "Stall, Snap" and dump it into the ground. You have so much more rudder/elevator authority that you will not believe it. Why did you clip the wing? Was it for a quicker roll rate? I also used a larger (chord wise) aileron, and mine get around a lot more quickly. I personally feel that the work in the nose area was probably the best mod. I did away with the cheeks, and added a streamlined nose (spinner to firewall) It does not like to slow down now. Give it a try. You'll like it.
Bill, AMA 4720
Bill,
Can you post pics of your mods?
TIA
Jim