c-903,you are correct,he is using a bt release and I did state earlier that you can't shoot with your elbow as high with a wrist release but you can still shoot a high elbow.
Yes this does become a personal thing,you can even look at many pros and their form will vary from one to the next but it just seems that "the best" have a lot in common.
I will second what Len said.Try to do one thing at a time and make evaluations.Maybe even make a log of what seems to work and what doesn't.After a while you may want to try things together and still keep a log.
I will add this,give changes an honest effort.It may take a day or two to decide that something doesn't work.I actually like to try to shoot a 3-d course after a change to see how I shoot under various shot conditions.Sometimes I can see potential with a change and other times I know to scrap it immediately.I recently made a bow hand position change and was shooting GREAT in the yard but when I hit the range I was throwing shots high and low.Scrapped that and went back to my original position and am shooting great.
Good luck.