Under shelf filament spool holder

I wanted to feed my filament from the top. First tried a long steel pipe with all active spools on it. Worked, but changing a spool wasn't easy. Unload the active filament, remove the steel pipe with 8 to 10 1KG spools, take at least halve the spools of, add new spool, insert pipe again, load filament again.........

So i designed this spool holder. It takes standard 8mm steel rod or 32mm PVC pipe. Front access for easy spool removal. Been using this for about 6 months and it works great. The