I don't think three oz of top weight will cause a problem with that layout. Have your driller lay the ball out like you want and he will be able to get it in spec with a weight hole.
Those that can do. Those that can't complain. Pimpin ain't easy, but it's mandatory.
Most things we like, we don't need. Most things we need, we don't like. Don't confuse your likes with your needs.