Spirit System

Are there any recommended servo arm ball distances listed for this system?
This would be for the cyclic and rudder servo's.

Helicopter is a Gaui NX7 with MKS servo's.

There are no recomendations, but basically you can determine which distance is fine.

If your rudder limits are too low, then the arm is too long. So then you can put shorter one. It should be approx. between 1/3 to 1/2 for the best performance.

Similarly with the cyclic. Here you should check Geometry 6° value. Values of 128 and higher are fine.