I've been using the SQWUREL now for about twenty canyons or so, maybe 150 rappels. Aside from rope twist, I have thoroughly enjoyed the device. I rappel mostly left handed, but alternate right and left occasionally. The wear on the device has reflected this. Here is an observation, and I was hoping to get some input and discussion. With the nearly even wear toward the "nose" of the device on the throat, I noticed a self sharpening edge develop. We all know how easily a rope can cut under tension, and when rigged properly this edge doesn't appear to be a problem. The rope never sits weighted on the sharp edge. If rigged improperly, simply flipping the bite so the brake strand is toward the nose, that sharp edge sits weighted directly on your lifeline. I'll be the first to admit how easy it is to accidentally rig this way, as it has happened to me. I can see how easy it would be to just get on rappel in this configuration without realizing. Thoughts?