Hello again Art.
I've taken some measurements and pictures of my spreader. The first page has the sketches of the top and side view, and some notes. The second page has photos. Ignore the masking tape; I put that on so I could mark the various stations on the extrusion. Let me know if you need any other information.
Here's the link to the PDF file:
https://drive.google.com/file/d/16xj...ew?usp=sharing
jack.