As of this time, I don't have much of this info, as the planes are not in my possession, but here are a few things I remember.

There is NO rudder to aileron or elevator mix.
I have 2% down elevator with low throttle mix.
I don't know where the CG is, but I did change it from forward to rearward from the P-05 to F-05 schedule.
I also do not know where the incidence is set, but starting with the indents in the mold, I dropped the TE of the stab down 3/32". This changed the angle of attack of the fuselage from tail low to a more "level" look.
Thrust is as per the front of the fuselage.
The rudder is very effective. I can do the 1 roll loop on low rate, but it is easier to control with high rate. I didn't notice any coupling at the extremes either, but I wasn't looking for them, just practicing.

When I get the plane back, I will try and measure throws and incidences right away, but it may be a month before I can get to it (about to be real busy). If you have any other questions about the Impact, please feel free to post them here.