Summary Version 2 of the Filament Spool Holder. Instead of an interlock system, these two pieces will screw together like a nut and bolt. This piece of equipment is very handy because it shrinks the axis of rotation. In doing so, the spool will unwind more naturally and put less pressure on your motors. Overall, it will increase the life of your motors and increase the consistency of your prints. As you can see in the picture, I used a 5mm all thread to mount the spool but anything long and skinny will do the job. Thank you for supporting my thing and let me know if there are any questions. Print Settings Printer Brand: Prusa Printer: Prusa Mk2 Rafts: No Supports: Yes Resolution: .15 mm Infill: 20% Notes: Supports are for the screw threads.