I don't have an old socket, as I had a revision last May. Another four inches came off! And I wouldn't trust the test socket to carry me for the long haul. You've got a point about the Hamstrings behind the knee. Next week I'll try to convince my prostetist to do a "little" more trimming. I'm a no-holds-barred kind of guy. This isn't going to dictate what I can or can't do. Just trying to be "normal" if you know what I mean. And yeah, have been trying to use the real leg to clip out with, getting better with it. Thanks, Bob