Anti-jam disk for the modular drybox

I really liked @tcosta_240835's drybox design with the Universal Threaded Hubs, but after using it for a bit I found that wide spools (like Prusament) would cause the gaps in the Hub to catch/jam on the arm and prevent the spool from turning: 📷 Image redacted — claim this model to add your own media These simple disks can be snapped onto the arms to prevent this type of jamming from happening. NOTE : After I published this, @tcosta_240835 updated the design for the arms (v9 in Feb 2025) to address the issue of jamming (and I published my own remix of the arm). However, these disks are great if you have the old arms (v8 or earlier) and you don't want to reprint & install the new arms, since these are very easy to install. These disks do add a little friction against the hubs (as the hubs end up rubbing against the disks slightly). However, as a number of people mentioned in tcosta's comments, without a little friction these hubs spin so easily that it can tend to cause the spools to unwind too much when filament is being pulled by the printer. So this additional friction can actually be useful. Options The ‘standard’ disk is 1mm thick and nicely pops off the print sheet, but cause a bit of extra friction against the hub. The ‘thin’ disk is 0.75mm thick which causes less friction against the hub and prints a little faster but it needs to be pried off the print sheet as it just flexes with the sheet. I personally prefer the ‘standard’ option.