I am finding my edge x will not grip my ttech grips, to the extent the throw is adjusting itself as I work. I am also finding it hard to adjust the throw, on examination I see that the inner part of the vice collet has a horizontal groove all the way round midway down, the back stem gets jammed on this stopping me adjusting without completely unscrewing the vice.is this meant to be there? Also I have examined my drive bars as I had problems getting the throw I wanted , thinking I was using the wrong length one but they appear identical in length? Anyone having similar issues , any ideas?