I am glad this went smoothly for you. The digitals are very hard to get all the buzzing out over the entire range. I always shoot for having no buzzing at the adjustment points and then live with the intermediate being just a little off. The problem is that the potentiometers they use for position feedback are not precision. They will vary in linearity from unit to unit so unless there was a way to do 4 or 8 intermediate adjustments on each direction of travel there is just no way the servos will exactly track each other.