Alternative Filaments.ca master spool

The Filaments.ca provided design for their EconoFil filament spool, while attractive, had one side which was significantly weaker than the other. This means it was a bit less suitable for filament spool holders which used the edge of the spool as its mounting method than the more common centre mounted ones. I built this design to more closely match the traditional spool design.

Despite the large cutouts on each piece, this version requires somewhat more filament than the filaments.ca version: 73.0m versus 66.5m for my printer and print settings. The centre of the spool holder is also slightly smaller than standard spools at 48mm (normal spools are usually at least 50mm), but a 50mm version is available if desired. Unless you need the extra space, I'd suggest using the 48mm to ensure the thread and inner walls of the inner part are sufficiently strong.

I've only tested this design with the PETG EconoFil filament, so it may not be suitable for ABS or PLA. I've also uploaded a sq