Jimbo,
The servo arms are just 1", control horns were about 1.5" out, High rates were set at 140% with -75 expo, Low 90% and -60 (futaba) High rates gave me about 45 degree deflection, I never measured to see exactly what is was. Lets just say it was plenty. ATV set at 90% up 75% down, max before binding

Ailerons were the same arms/horn distance High 100% -70, low 60% -40 (but ATV was set 140% so I maxed out the travel that way)

Why they gave you those ginormous arms I don't know,, you'll have to reduce your end points so much?? . I didn't realize they were that big when you showed them being painted. I just don't see the point in using arms that big.

Also my Rudder was set up 2-5/8" arm, just under 3" horns, crossed wires, high 100% -50, low 65% -70.. Rudder ATV was set at max not to touch the Elevators but around 100%.

Hope that helps,,