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As my 3d drawing is crap and can't seem to grasp it I am going to print parts for a 3D scanner I found and try that. I bought the 2 lasers needed from China and just need the stepper motor and Arduino board to complete it but Xmas got in the way . I found the info on Thingiverse.Pete
You could save yourself some material and printing time by hollowing out the underside, if you print them top side down there won't be any need for additional support.
Why not just ask Bruce or myself to carve one out of a nice tight grained piece of hardwood on one of the CNC machines?Murray.