2 piece magnetic bin I made for the filament ejector on the plus 4.

Uses 6m magnets.  Mount slides over the screws on the back of the chute.  Be careful I accidently stripped one screw and had to replace it with a small #5 screw.

Onshape files if you want to modify it.  There is also a larger bin I didnt try printing.

https://cad.onshape.com/documents/087ef786ab242bf7f0b3b07d/w/78ae695e1a22c936aad87f46/e/8e276fd7f7803a78577be82a