I've always welded a bolt across the race and tapped it out with a hammer. A couple quick tacks and light taps drop it out. Haven't had an issue with seating new races/shortened bearing life *yet* though.
If you make them, you could simply do what mazdatrix says to do when changing the bearings - grind notches out of the center shoulder. Except being that you're making the whole assembly, you could put 3 or 4 notches in to allow a punch to get under the backside of the race - that should do it
w00t for new FC products
