Thanks for the design, works very nice. On my printer I had to shrink the size of the "screws" by 7% to get thm screwed into the bases. How are others experiencing this? Is my printer not well adjusted or is this to be expected? My lids want to fall out at the back or front, I am using this design mainly for lids for kitchen glass containers. So the lids have lips in the middle of every side that stick out a lot. Maybe a kind of cage that is connected with te vertical parts might help with that?