Bob,
My guys regularly surprize me one day incredably capable/conciensious/lateral thinking etc. etc. the next a slobering laxidasical moron. And never in any predictable order. Smart skilled and talented, but not always. So he says smiling," to cater for the off days" it should preferably be simple to operate!
I am leaning towards something that I can clip onto my twister, and use the slide bed as a rail ala steady rest but with a clamp, unclamp rollerset.
Jeff,
Using the roll grovers principal for the chuck would work a treat, thanks.
Ian