BBS,
I think guys get a little carried away with EXACTLY how to do stuff. Like the amount of time, exact angles. There are three things which I think are important in the hanging process.
What you feel.
What you feel.
and then,
What you feel.
First, you have to be comfortable enough to relax everything. This means where you hang (chair, bed, whatever), what you do while hanging, all the comfort levels must be maximized.
Also, the attachment must be comfortable. No pain, ever. You must be able to relax and not worry about the weight.
Then, you need to examine if the hanging is giving you the desired effect. Can you feel the work?
If you are not meeting these criteria, then you need to change. This is not torture and while I was hanging, it was never unpleasant. Also, if I did not gain a mm, I never wasted the time because I was busy doing something else.
Concerning BTC, there are several degrees of angle on BTC. Most of these will hit the suspensory ligs to the max, which is the desired effect. Some of the less severe angles will better hit the fund ligs and should be explored. You do not have to always go for the most severe BTC angle.
Bigger