threesixesinarow,

Thanks for the tip on leaving the key screw disengaged. I never gave that any thought before, but it does allow one to retract the quill to change bits with no loss of location. That was my biggest frustration. I need to think more outside the box. I did go to the Proxxon website and saw the little edge finders. Well worth the asking price of $35, but I would like to build my own. There is satisfaction in doing.