I finally have the DRO installed how I want it on my 626. Last stage was to fit a scale to the quill and plumb it into the console combined with the table scale through an M_DRO summing interface. Space is tight and I had to shorten the scale I had but I'm happy with the result and having both quill and table on the Z axis is brilliant. I'm using the depth stop nuts to hold the scale brackets in place for the time being but when I dismantle the head for further modifications I'll drill and tap for securing screws.

William.