David 3D scanner

Step 2 Frame thang

Then you're off to make a square angled thing where to place the prints you make from the

Calibpoints_Scale60_DIN_A3.pdf or
Calibpoints_Scale60_DIN_A4.pdf,

I went and done a hap-hazzard contraption from a couple of straight
Styrofoam boards I had, and glued a cut Kodak envelope onto it, AFTER I cut and glued the A4 page into it.

See, you can make an half-decent right-angled frame, even if you're a lazy slob!