I got a bit tired of collecting mostly used filament spools. Those things take up a lot of room, so I decided to print something smaller and re-spool the "short-ends". This spool is threaded for disassembly. It has 3 legends debossed in the spool and an insertable marker to indicate the type of filament on the spool. It prints at 0.2 layer height and the .gcode prints the first layer at 0.3 mm (this helps the lettering and holes on the periphery work better).