upbox spool adapter
thingiverse
Now use one kilogram spools in your UpBox. See when your spool is running low. If you try this, I'd be happy to hear your thoughts.
Download Model from thingiverse
With this file you will be able to print upbox spool adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on upbox spool adapter .