I ordered some filament online and the spool had a 32mm diameter hole in it! So I made this for mounting it on a makerbot replicator. It seems to work fine... also works great for larger size spools (all spools really)! The 8% angle keeps the spool tight against the machine without any annoying finger squeezing.Personally, I think it's actually better than the ones that come with the replicator...If I were you, I'd print it with a raft and full support, and 100% fill!I made it with Tinkercad, so you can modify it online at: https://tinkercad.com/things/5OaW4GuQXgp