I use an APC 12.25-3.75 on my 46FX (on an Ultra Stick 40). It runs pretty good but I agree it takes a bit more to wind up. I'll fly it for a while that way before I go to 12-4 or something smaller.

I read a post that a guy tried CG's all the way up to 5 1/2 and that was finally the end of the CG range (it was barely controllable). He said he finally ended up at 4 3/4 or 4 7/8 I believe.

This thing is very very controllable at slow speeds. It's just the best plane if you ask me. My tank is not raised and it draws fine.

Joe