I've seen a couple references to this. In the TradGang video (which I highly recommend...to anyone, regardless of skill) Terry talks about it. It's escaping me what exactly the second anchor is?
Is he, or you, referring to the knuckle in the back of the jaw as a 'second' anchor to the the finger in mouth, nose-on-string, fletch-on-lip, or whatever you consider your "primary" anchor?
That's the only thing that makes sense to me, but it almost seems like you guys are talking about something you 'feel' in your elbow or shoulder?
I just want to make sure I'm not missing out on some secret zen to 'feeling' things in the string arm/shoulder.
(P.S. I'll try to get another video tomorrow. I'm not "flinching" anymore and arrows are actually starting to touch each others' fletching...every now and then...from a whopping 10 yards :D )