filament spool holder

I designed this for the 3d printing nerd spool holder challenge https://youtu.be/lKmNluRGY8M but had not completed testing on it until after the contest ended. zit works well but it is not the direction I went with my filament storage. It rests on a 1"x2" french cleat the support tube is designed to print laying on the flat with no supports. the whole thing is very stiff and rigid.