I've since made a larger version of my jig in anticipation of needing it for student projects this semester. Quick photo here. I cut all the parts (but the top bar) from a roughly 2' x 4' piece of 18mm (3/4"ish) plywood. The top bar that bolts to the front frame member is 1/2" plywood (could have been hardwood) with two end pins joining into the vertical connection bracket.
Last edited by 4DThinker; 10-10-2016 at 07:49 PM.