I tried them all and nothing would snap on to the AMS buttons of my two new units purchased May 2024 so I downloaded this file and hacked away at it in MS 3D Builder to create one that actually snapped on to my AMS and did not rattle or easily come loose. I added a bullseye dimple that your thumb naturally gets traction on and makes loading a breeze.

I could not help but think these could still be better so I made some minor tweaks to the file and sliced it for PETG. While the PLA+ version is indeed fine, these really lock on.

For these I use 30mm Bambu PTFE tubes add guidance and smooth feeding. - Push the tube all the way through so 3mm is hanging out of the bottom side as shown in the images. This gives you PTFE from filament to funnel. Gently shape the PTFE to a nice arc towards the spools. Having filament in the PTFE can help you to not kink the tubing, you don't want that. :)

I tried Capricorn tubing and the ID was a little too tight and there was a little drag. The PTFE fits very tightly and wont come out. Steady even pressure to install without kinking the PTFE is required. “Use the Force” as they say. :P (I was unable to add a PTFE tube as a BOM item but pretty sure y'all have some laying around.)

https://us.store.bambulab.com/products/bambu-ptfe-tube

Printed in Sunlu PETG.

Def an item you want on your machine from new to avoid any wear and tear from abrasive filament.

Enjoy!