Adjustable filament spool holder for 2020 profile

thingiverse

This design is inspired by the [Tevo Tarantula Pro Filament Holder by 3D_Cre8or](https://www.thingiverse.com/thing:3934235). I used that mount for a long time, but eventually the spool started binding on it. However, I really liked that design (it looks very cool!), so I made my own version which: * Would have the spool mounted on some rollers, so that it could rotate freely; * Would allow to just take one spool off and place another without disassembling the mount; * Would work with spools of different width (between 30 mm and 80 mm); * Could be mounted onto a 2020 profile; * Would look kind of like 3D_Cre8or's design. So, that's how this thing came up :) Required hardware: * M5x100 screw with countersunk head (for me it was the most difficult part to find...); * M5 nut (4 mm thick) for the roller carriage; * 2 x M3x6 screws to mount the screw cover (either front or back); * M4x12 or M4x14 screw with M4 T-nut to mount it onto the 2020 profile; * 2 x 2020 V-slot rollers to scavenge bearings for spool rollers; * 1 mm M5 spacer from one of 2020 V-slot rollers. Total print time: about 11 hours **Updated at 01-03-2021**: * Added another option to put the M5x100 screw inside the body - now it can also be pushed from the back to the front, so that its head would face the back side. This should make this thing much more convenient for Ender3-like printers (Ender3, CR-10, Tevo Tarantula, Tevo Tornado, some ANET printers...) with bowden setups. Beware though that you will still need some filament guide to use this mount with bowden extruders - I'd recommend [this one](https://www.thingiverse.com/thing:2917932). * Made the cutout for the stationery roller a bit smaller. Now you won't need to find a 1.5 mm thick M5 washer - you can use 1mm brass spacer from one of 2020 V-slot rollers instead. * Widened the cutout in the middle of spool rollers. Its edges won't rub against bearing hubs anymore, and rollers should work smoother.