It is really difficult to give you pitch suggestions without seeing your hand. BUT if you want to do the 1/4 reverse in the thumb, I believe (and someone on here will correct me if I am wrong) that for ever 1/8 you move your thumb towards ZERO you should only move your fingers 1/16 reverse. If that is the case then you would be at 1/4 reverse in your thumb and 1/8 reverse in your fingers.