5 Infill patterns to choose from. Each print profile has different filaments you can select that will imprint what filament the spool is printed in. I did this mainly to help me know what temp each spool can stand in the filament drier.

Can I change any settings?

YES! just understand there is a trade off between stiffness and different infill patterns and such.

What's the best filament to print this in?

PLA is great however If you dry a lot of filament, print them in PETG, ASA, or ABS to avoid warping in filament dryers. I have included text on the inside of the spool so you can know what material the spool is made of to avoid warping it when drying. So pick the appropriate plates.

When I attach the spools, I can hear clicking. Should I be worried?

No, this is normal! The RFID tag may gently scrape against the infill patterns when closing the spool. Just keep going until it clicks in place.

Will this block my RFID readability?

Nope! Your AMS will read the tags fine with this reusable spool.

Do I need to use the spacing shim?

It's been added as a 3rd plate because the official Bambu Lab version uses it. I have never need it personally so I don't bother, but you can use it if you like.