RE: thumb trigger release
I usethe Tru ball Chappy Boss which retails at about $160-170. I hunt with mine, and yes GMMAT is correct, you must be very careful with them. I dropped mine whilestalking in 3 inches of snow and luckily my dad found it. I clip mine on my string while hunting in a tree and havent dropped it out of the stand yet. I ensure that i put it in my pocket when i am climbing down. I love this release, although the price is very high. Tru Ball also makes a Pro Diamond, that runs about $70-80 and is a very similar release. Improved my shooting immensely! Good Luck!