Just one other point, the ROLL servo really needs to be a SV52 and set to 90% torque.
You could use the SV42 but in IMC, and with an upset, while you are for just a moment checking a chart or flight plan, or changing frequencies, programming an approach....you get the idea, what do you think happens?
The upset rolls the aircraft and then the servo struggles against it, you look back and the horizon is not where you left it. Worse still if you have the pitch disconnected on descent
The optimum for an RV10 is SV52 on ROLL and the SV42T on pitch.