You can eliminate this by "clocking" your resolver. Take the cover off the back of the servo motor, loosen the three cam lock fasteners that hold the resolver can down servo motor. Without moving the resolver shaft " it is still connected to the motor via the coupling" rotate the resolver can a few degrees. It takes a bit of playing to get this right. This can also be helpful when after CS the flags don't line up, its a better way of fixing it than just moving the flag.