Originally Posted by headlessagain
All my FB's from my 16.5"er to my 39" version have been built with a KFm-4 wing and all fly brilliantly. They all track really well and laugh in the face of windy conditions. The small versions is a wee bit twitchy, the bigun is more of a floater, which I reckon would slope soar with it's lighter wing loading but the best compromise is the original version. I also extended the nose on all of mine.
Going to have to do a quick tape on lower step and give it throw.
Noticed you had twin aileron servos on your large Funbat. Do you do any funky flaperon mixing or just aileron only.