I have been using my 1st generation SEB rest for a while now and like it overall. I have found though that I would like it to be slightly notchy if I am trying to move it just a very small amount. Even if I back it right off, it takes a bit of to and fro to get the cross hair just where I want it on the X ring. Has anyone here tried anything on the Teflon slides to smoothen it a bit?