Great design. The only thing I'd change is the requirement to screw and unscrew the spool holder cap every time you want to change a spool. All that's needed there is a bump stop or something simple.... (edited)

Great design. The only thing I'd change is the requirement to screw and unscrew the spool holder cap every time you want to change a spool. All that's needed there is a bump stop or something simple.... (edited)
@Eric_913459 In the near future I will add that as an option instead of just the threaded cap.
I appreciate the feedback! Happy Printing!