Finally got my shift ball in today! Had to install it right away and try it out. With my big hands it feels so much better, and with all the rowing I do I felt the nice oem shift knob would be worn down quickly.
$32 shipped and it has a decent weight to it, google says 5.5oz for a billiard ball, I know the original leather weighs next to nothing.
For future reference shift knob threads are M10x1.25