Agree with your description. Just punched up one, I wanted to say it's a 'control' ball (4.5x65 pin up), but it needs a lot of oil to do its work.
Mine is smooth, continuous, hits really hard, and doesn't go big angles.
Also like my STC a lot- that one has such a beautiful roll, and can really turn the corner too.
Going to follow Doom's suggestion and do a 4000 on my WHB.