I was sick and tired of constantly printing new spool adapters for the AMS when they didn't fit the various cardboard spools I use. Whenever I got a new cardboard spool, the adapter rings I had been using were either too small or too big. If they were too small, I couldn't get them on; if they were too big, I had to glue them in place to prevent them from falling off.

I've now designed my own adapter, which has a built-in flex mechanism that can open and close, and sort of clamps around the spool. They now fit all the spools I have—and they’re reusable. They’ve worked perfectly every time.

Tested and working with many different spools from eSUN, though they should fit most brands, I suppose.