James The QCF is a pretty slick design. There are two posts that screw into the barrel where the forearm screws normally go. The forearm slips onto these posts and is held in place by a groove. When the forearm is in place a locking lever on the right side is twisted 90 degrees that locks the forearm into place.
I noticed a slight wiggle in the forearm and tried shimming it with small shims. Plastic shims cut from a milk jug worked perfect for shims.
When I tried my first groups at 100 yards I got verticle stringing after the first 3 shots. The screw that holds the back post to the barrel had loosened up on me. I lock tighted them both down and the next time I went to the bench the verticle stringing was gone.
I think this system was carefully thoughtout and well designed. However, I still dont particulary care for the composite forend. I like the feel of my walnut forend much better.
A picture of the quick release forend is on the TC site under the stock and forend section.
I had also thought about drilling holes so I could knock the pins out without taking the forearm off but I didnt want to mess up a nice forearm experiementing.
One thing is for sure I love to fool with my stuff and this encore has more than stimulated my imagination since I got it. Im thinking of getting me another frame so I can have two projects going on at the same time.