Slow forward a few months and I got time to cut out the walls of the DT&ST tubes. Lined the blanks up on my well used mill by eye. I placed solid cylinders in the ST&DT to prevent vice crush. A bit of trial plunges with no power and away I went. It went well. I played a bit with possible shore line shapes on the shinny practice blank. It seems that a, sort of, Art Deco look is where I'm going... Andy