It's basic design for holding your filament feeding into your 3d printer.It could be improved by adding a bearing mounted axle! (I am now far away from the machine and the coil support, so I'll let you do it...)Mount The project is made of mdf board (5 mm thick, 27 cm X 29 cm), the attached file can be used to laser-cut the mount. (2 bottom holders are not really necessary).Axle We used harware we had "on the spot" and I gave the holder, so I can't list the parts. I recommend to just find something to use as an axle that will make it of a fixed lenght of just a little more than the width of your coil. This will make the mount solid. Bearing system would be great!