I’ve been meaning to put up a photo or two of my setup for ages.
This is the configuration I’m working with at the moment. The overall frame needs some refining, but I’ve been really happy with the box beam. It is made of 6" strips of 1/2" osb glued (polyurethane construction adhesive) and nailed (18ga finish nails) with offset seams to make a 12’ beam. It’s cheap and VERY rigid once everything is dried. I did a box beam because I thought it would be critical to keep the chainlines in plane and reduce torsion, flex, etc., but after working with the machine for awhile now I don’t know how important that actually is…
Anyway, thought I’d share and see if anyone can benefit from it.