its all about the size of the coin for this move, if like me you find dollar sized to big and halfs too small then go for an tenkie grip insted or back thumb palm.
the back palm is not essential unless you want a carrer in doing the misers dream

if memory serves eric jones dosn't mention the back palm once on any of his 3 dvds nor is it mentioned on the new f*ing coins by those two french dudes, must get around to doing a review, and there stuff is realy good, so not that important i never use it myself not when a tenkie or jw grip will suffice.
