I would pick up the new book out by Larry Wise called "Core Archery". It deals a lot with compound shooting but it works for your form whether your shooting a compound or traditional. I really like it, it is really well written with steps to acheive perfect form evrytime, repeatedly. The form he chooses to incorperate is back tension, using your Rhomboid muscles and your Levetor Scapula. But I like it in the 3rd picture better. I also would try using one finger on top and two on bottom. Good Luck.