If you have access to a cnc, I would go that route, it'll turn out with the best finish, and it won't loose it balance. lightly round the tips, to cut down from them becoming hot spots.
I have seen a lot move cutting on them then that, and they have not had a problem with them, not to say you won't get a crack. Just watch them, if they do, take them off before they get worst.
I like the idea.

Pat