Cardboard Spool Reusable Adapter

This adapter allows you to reuse your old cardboard spools to add new filament too. The spool was made for the Overture Cardboard spools, but it most likely be able to work with other spools (Hello from the future. I've made new spool sizes with the new spools I've tested, see Edits and Profiles.). I'll update this as I gain new cardboard spools. The two adapters use a tab system to connect to one another on the inside, so it shouldn't widen the spool at all. I also provide a hole that uses friction to keep the start of the filament in place if you are manually respooling the reel. In my testing this does a really good job holding the filament in place till the very end of the spool, so much so they you my get an error at the end of the spool if you have jammed it in too far saying the filament is stuck. Edit 3/26: Added a second profile/stls for Esun cardboard spools because the spindle is small enough to make it a hassle to secure the Overture sized collars. A little