A simple alternative for adapting your spare spools for overture's cardboard spools. This one is designed to be made with TPU and it's not the full width of the spool because it's not necessary for it to be so to work. However feel free to scale it up if you want it to be so.

How to use this:

• RIp off one half of the cardboard spool
• Insert the TPU adapter to the inside of the cardboard spool 
• Slip on one half of the AMS reusable spool
• Carefully flip over the spool and rip off the other half of the cardboard spool
• Insert the other half of the AMS reusable spool and lock it into place

Tip: Check the photos to see an overview of how to use the adapter. 

I printed mine with 90A TPU so its pretty soft.