Quote Originally Posted by Okapi View Post
Just an idea for the ball seat, why not making it with the radius tool on a diameter which can be put in the hollowed part(bronze or steel heattreatable), fixed with Loctite or mechanically inside, the surface quality is better and it can be hardened, it is a solution too if you haven't the right mill diameter ?
Seems like a good idea. Or at least maybe use a ball-end mill, if available, to get a smoother finish. I think I would want some grease in there as well.