The aim of these spool adapters is to make the end result as similar as possible to the dimensions of the Bambu Lab spools, for a seamless integration with the AMS. I've tried a few other existing spool adapters, but none were perfect. Either the size was not correct, or they were not strong enough and were bending after some usage, or they were too thick for some specific spools (the ABS black spool I have is 65mm wide, meaning that with a wide adapter, it would not fit in the AMS anymore).
I've spent several hours measuring several different SUNLU spools and this is the result. The same ring should be printed twice and it can be used for both the right and left side of the spool.
Tested spools:
Please note that since I only own the filaments above, all other types are untested. I will update the models if I buy any new filament types in the future.
I have printed my adapters using SUNLU PLA+ and with Bambu PLA Matte, getting great results in both cases. Please let me know if you encounter any problems.