Laser-cut fixture for milling polycarbonate

I use a lot of polycarbonate, but unfortunately it's not laser-friendly, so I wind up milling it. I lasercut this fixture out of acrylic to hold 4" wide strips of 3 mm polycarbonate, a convenient stock size that works well in my Taig CNC mill.

It allows repeatable positioning (I can loosen the M6 bolts, slide more polycarbonate in, and tighten them again and run the same job without having to re-zero), keeps the material fairly stiff while cutting, and doesn't waste a lot of room with big cla