Does not properly fit on my hatchbox spool. Clever design, but unfortunately the vertical dimensions do not allow for proper insertion into my spool. I ended up printing 3 at once only to find out that the design is too big for the spool I have in hand. The spool I have is identical to the one shown (other than color). I can force them in, but unfortunately, that snapped off the hinge.
Would be good to allow for a variation that has heat set inserts for a more rugged hinge option