RE: back tension release
Carter has a new release out called the Solution 2 -- pictures are now on the website. It has a safety and travel that always the same once the safety is released. It is not excessively long either. I would like to try one out.
I have used Stans (really like the Sahara), Carters, and Zeniths for pure BT releases and I use a TruBall XTreme (thumb).
Some people can't have a tough time shooting a wrist stap release with BT and easily revert to punching and such. For every pro out there who uses a wrist stap, there is a pro using a pure BT release and several using thumb trigger releases using BT. Also many pros practice with pure BT releases. I have a video of a shoot-off between Jeff Hopkins (thumb trigger), Randy Ulmer (pure BT), and Collin Boothe (wrist strap). So to each his own. Personally, I have trouble getting a good anchor with a wrist stap release, but I can shoot one.