Wanhao Taulman Spool Holder

So I bought a spool of Taulman Nylon 645 for a special project for a friend, and when it arrived, I realized I had a problem- it has a very narrow opening for the spool holder. Under 20mm. So I designed these spool shafts to fit the stock Wanhao spool mount without any fasteners.

There are 4 distinct versions of the spool shaft here. The ones named "Taulman" are designed to fit the narrow opening on Taulman 1lb filament spools. The ones named "Standard" have a 30mm shaft designed for n