Read a similar thread a couple of weeks ago and decided to tinker with the Bear Weather rest as well. I put it on an ACS. Because it is cut well past center, I left on the little bump at the arrow pass.
Just started playing with it, and I tend to shoot high, but I'm sure my brain will compensate if I do a little more shooting. What I find amazing is the excellent arrow flight I get. I have a tendency to vertically torque the string and pluck at times as well. Even when I do those things, I still get excellent arrow flight. Will definitely be extending the trial. So far, I'm impressed.