I converted the Simple Davinci Spool Holder into a Wall Mounted Spool Rack using Tinkercad. This gives me an easy way to store my extra filament spools on the wall above my printers. The design was printed at 50% fill and 0.4 layer height on my Stock Da Vinci but would fit on any 200mm by 200mm printer. Two drywall screws hold it in place. I use 3" screws. I printed with ABS.