I would almost venture a wager to say the large intermediate diff of the MoRich balls of a decade ago is what caused the downfall of MoRich and why the company does not exist today. The balls were EXTREMELY drill and user specific. I know many folks who drilled a few of the balls, were garbage for them, and even when MoRich scurried away from the huge intermediate diff, customers did not come back.
Could the ball have its use? Yep. But it is like fitting a square peg in a round hole...there are other choices that are probably better out there for you.