This is my first real build and my first upload. I printed the Tecbears AMS Lite adapter by D3luxee. It seemed like a great fit for the Tecbears plastic spools that I use (from Amazon.ca). However, after my first print, I noticed that spools didn't quite stay put despite the snug fit of the adapter. I created a simple ring lock (in blue). Insert the adapter into the spool, then snap the ring the end to keep it in place. There is a little bit of movement when I force it, but I haven't seen any movement of the spool when it's on my printer.

I printed with basic PLA without issue.