I have been working on this quote from Terry for the past 2 weeks and this has improved my shooting more than anything. I think the double anchor has made a much more repeatable shot and a lot more accurate. I think coming further back to anchor my thumb base knuckle behind my jaw and under my ear has made for much better back tension and has got my elbow in the correct alignment for the first time. Below is the quote from Terry.
The 2nd anchor for me insures that I get the proper alignment and back tension.
If you just anchor in the corner of the mouth, your elbow can be pointing anywhere....by sliding my thumb base knuckle behind my jaw under my ear....I'm there...all aligned with proper back tension.
I worked on this on the bale and grooved it in, I do not have to think about it at all, its just the way I shoot now as the arrow don't go till that 2nd anchor is obtained. Its ingrained into my subconcious and really helps keep windage issues at bay.