I have found setup bearings to be dead accurate if you make them yourself and make them just fit as in slightly tap on and off, and use the same brand bearing to assemble. I am not a fan of beating carriers in with .012-.015 of shim so I have a spreader. Check out the Jantz engineering 2 part series on u-tube to see how to set up a dana fast. He made it so easy to get perfect patterns. Carl Jantz also has a u-tube on how to make setup bearings, and another showing gear patterns as you move the pinion in and out. Believe it or not I made a set of 3 dana setup bearings with one Dremel brand rough sanding roll, there are other ways but it took all of 5 minutes. Anyway whatever you decide Dana's are easy done the Jantz way.