I just switched to a thumb release and my form/anchor point has improved my groups. The only thing that concerns me is as I was drawing the bow back, the thumb release hit my shoulder once and the bow went off. Hunting situation, 60% of the time I'm forced into a weird position in my stand and I'm concerned about drawing the bow and bumping the thumb lever now. I have a tru ball bossX 4 finger. Sent from my iPhone using Tapatalk