I don't use grips, but have 5/8 reverse (RF) and 3/4 reverse (MF). My finger joints are very stiff from jamming them multiple times playing ball when I was a kid and bowling for 45 years. Before I learned to fit and drill both fingers had 1/4 forward pitch, and my joints stayed sore all the time. I changed the pitches, didn't lose any revs, and my joints don't hurt any more. I very seldom put a customer into forward finger pitches but frequently use reverse. -- JohnP