Okay, let's build the fixture jig.

Material list (Lowes has all this stuff):

1 Sheet of 3/4" x 4 x 8' MDF flooring board, strip it down to a 2' wide width.

about 4 - 3/8 x 4 x 36 pine craft wood planks

24 x 24" piece of 1/2 particle board

5 min epoxy

72" straight edge

sharpie marker