Originally Posted by Hydro Junkie

I found this on page 35 of that manual, which is for an 86" span Warhawk, so these should be close to what your 89" spanned bird would need:
These are the recommended control surface throws:
RATE................... HIGH............................ LOW
Elevator................ 1"/13*.......................... 3/4"/10*
Rudder............... 1-7/8"/18*........................ 1"/9*
Ailerons............... 1"/18*.......................... 3/4"/13*
Flaps................ 2-1/2" /36*
All of the above is measured at the widest part of the control surface
It also says to balance the plane 5.5" back from the trailing edge of the wing when using the GP C.G Machine. The manual gives an experimentation range of 5/16 forward to 3/8" aft as well, depending on the pilot's skill level