^^^ Yep, and if you notice, right before I took that shot, instead of my non-firing hand holding or bracing the bottom of the buttstock, I switched to a balled fist under the bottom of the buttstock - exact same principle and use as the squeeze bag. Tighten up the fist, raises the buttstock, lowers the sights. Relax the fist, lowers the buttstock, raises the sights. I got the height right for the shot, and did it.
That was the first time I'd ever shouldered/shot Greg's LaRue rifle, and he has a PRS with Accu-Shot monopod on it - I had to take a minute to get used to the setup, before shooting it.
That thing shoots like a dream... <thumbsup>