I have flown Gary's 91 extra 3 times now, and each time I have had a different impression of it as he has tweaked his setup and CG.  At first it was pretty much perfect for me, then he moved the CG forward and I hated it,  Now it a mature setup and I find it comfy.  Not the way I would do everything, but it did everything I asked of it.
The newest thing that I am learning now is ailerons as I always fly in high rates, which is usually 50+ degrees.  Well at that rate they are air braking as my mid rates roll faster on a lot of my planes.  I need to setup my mid rates closer to the 36-38 degree mark and reserve high rates for hovering and such when I need deflective force.