Filament roll holder

Simple connector to create a filament roll holder using those pieces of threaded rod that you had left over from making your 3D printer. Just add 4 legs (about 13 cm long) and a horizontal bar, which can be long if you want to add several filament rolls. I put some circular bearings under the filament roll, but a cylindrical bearing will probably work. For the feet I used some PolyMorph, because it was quick and easy to flatten.