RE: T.R.U. Ball Release
As far as I can tell, you can flip the thumb peg over. It's just held in place with an hex screw. I honeslty don't even need the thumb peg. My thumb rests comfortably on the main trigger post.
Actually, now that I think about it, I bought the extreme version used last year off a guy on archerytalk, and it came with the thumb peg on the opposite side of where I like it, so he may of been left handed. So I think you'll be ok.
I switched to a handheld release like this because I've been shooting back tension releases since 1995 for target, and using this type of release for hunting just felt more comforable that having that big velcro strap around my wrist. I just tire some D-loop string on my release, make a loop at the other end, and slip it over my wrist so I don't drop it out of a tree.