I pretty much exclusively use refills or filament that comes on cardboard spools and I haven't had the best luck with spool adapters in the OG AMS. So I decided to transition everything to respool spools… but I had trouble finding some that I liked. There are a load of good models on MakerWorld, but most of them have extra features that I don't need for my use case. So I set about designing a simple model that's quick to print, super lightweight in material use, and looks sharp to boot. At 110ish grams per spool entirely you can get eight or nine of these spools produced from a single roll of filament. This spool does not come apart, and is appropriate only for respooling devices like the Pastamatic (I did design a twist-lock version of the spool that's also available on MakerWorld at https://makerworld.com/en/models/134631#profileId-146104 ). The project file has the cut connectors already in it-- just a little CA glue on the rim and snap it together. Works great for my use case and I haven't had any issues. I would strongly recommend printing with an outer brim and printing in ABS or another high-temp material if you ever plan on putting the spools in a filament dryer. If you don't plan on putting it in a filament dryer, you can print in PLA and it'll do just fine. Have a great day!

(Note-- I have included in the raw files version the .stls for both the version with the Bambu sticker nametag, and the naked version without).