Laser Focal Length Aid

Building on a YouTube video by Patrick Hood-Daniel, "blackTooth Laser Cutter/Engraver - Determine Nozzle Height for Optimum Focal Length"

I wanted to create a 'jig" to hold my material at a set angle. And, by using a wedge of the same angle, allow me to easily measure the distance from the laser nozzle to the point where I determined to have the smallest kerf.

I cut this object from 1/8" black acrylic and tapped the holes for M4x80 spacer screws.

I then glued the small triangles, cut