What are the mods that can be done to the KF 3 to improve performance? I'm hoping that Vne can be improved also somehow. My brother and I are intending to put the Viking HF-110 in it. We think the flaperons have received the re-enforcement mod. We just finished adding some 9/16" tubing in front of the rudder for a smoother entry angle and slightly larger total rudder area. I was also wondering if the aileron differential modification kit is worth the price.
Just one more thing. has anyone added side thrust on engine mounting to compensate for adverse yaw? If so, how much angle should be added?