I was able to do this mod with the 3/8" compression fittings, but the dogbone end of the swing shaft that fits into the diff cup binds up. The 3/8" compression fitting is too snug around the tip of the swing shaft to allow it to move freely in the diff cup. This creates a jerky movement as the swing shaft struggles to move in the diff cup. The 3/8" compression fitting is getting pretty thin where I have been sanding it to fit the diff cup and I do not want to remove any more metal. I am going to step up to the 7/16" compression fitting and use the aluminum foil wrap. The ends of the swing shaft easily fit inside the 7/16" fitting and should not bind when I am finished.

Also, the trick with the drill works great and saves a lot of time.