Used an old Black & Decker workbench whose top had long since rotted away for the stand. Painted 5/8″ flooring plywood for the base, 1″x5″ pine planks for the sides.Box is made to be removable from the stand for portability (nuts should be replaced with wing nuts so no tools needed).
Luggage handles on sides so can be carried flat. 28.5″ x 39″ so should fit through most doorways on the level (no need to empty sand, provided handles strong enough; remains to be tested).
Camera and projector suspended from standard metal shelving brackets, held to box with clamps for easy removal and repositioning. After the optimum placements have been determined will replace the twisty wrap fasteners with something more solid (yet to be designed).
Calibration wand. A compact disk with white paper glued on top side, then cross hairs pencilled in. Handle made from coat hanger wire bent in a funky “u” to provide wider hand grip and support left and right sides of cd (allows steadier positioning).
yk sandbox 