I strongly recommend you don't set you final rudder stops until you have covered and painted the tail (applies only to airfoiled tail). The reason is the covering and painting add quite a bit of thickness to the rudder leading edge as well as the fairing on the vertical tail. You will then find you need to back out the rudder mounting rod eyes to allow clearence. As soon as you do that, it changes the rudder stops, which then requires you to ADD material to the rudder stops which is far more difficult to do than removing material. Just cool your jets and wait until covering and painting are done, then tackle this easy task of final rudder stops. Don't ask me how I know all this.