Spool Holder Plug

This is a plug designed to be printed in TPU that goes into the end of https://www.thingiverse.com/thing:2761246

I had a problem with spools sometimes migrating off the holder.

The plug should have a disc made out of harder slick plastic like a soda bottle. The center hole in this disc should be 17-20 mm in diameter, and the disc should be 50 mm in diameter approximately. The disc goes on the plug and then the plug is inserted into the holder after the spool is loaded on.

I have included the Microsoft 3D Builder file in case the hex size is too large or small based on your printers output of filament.