Dont get too hung up on back tension.
Use a stretch sports band to learn back tension action and feeling then at the Bale with your Bow and build that feeling so it's second nature, it will feel very akward until you ingrain it into your subconscious, once you get to that stage everything will feel easy.
With Trad we tend to have higher draw weights and high anchor, back tension is hard (for me at least) to feel so dont worry too much about it as it will distract you from the real task of putting an arrow where you want.
I got a clicker for my Longbow from 3 Rivers a couple of weeks ago, I found it a great training tool to get to draw and extend through the clicker, relax and extend through the clicker, do that 4-5 times and come down, rest and start exercise again, think it's working my Scapula better than the Foremaster and it's cheaper than the Foremaster.