Ed, That looks like innovative and neat work. Now the apparatus begs the question, have you ever looked at a standard silkscreen jig from the art store to do the same job? The design you made is considerably tougher, but some of the silkscreen machines are pretty well framed using hardwood. FWIW (which probably aint much)
This shows one of the two side mounts of my SMD solder paste printer which is attached to the MSD nylon strip which rides in a groove inside the cheap T track. The T track is simply screwed to the 1/2" slab of aluminum. The acorn nut provides tension through a 1/4" threaded rod and keeps the pull-handle gripped between the two sides and provides tension on the side plate which puts side pressure on the MSD strip in the T rail. More pressure makes the device slide slower and less makes it faster.
The squeegee holder can pivot to either put the squeegee down on the bed or to hold it up off of it after a solder run and you want to move the squeegee holder back to the other original end of the board without smearing your deposited paste.
The second photo shows where the squeegee holder would be positioned after a "solder-run" was made. I would then rotate the squeegee up 1/8" inch out of contact with the bed and move it back to the other (starting) end of the bed.
Ed
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