Filament Duster in AMS Snag Cutter Style

I wanted to add filament dusters/filters to my AMS (similar to this) without compromising the simple utilitarian look of the AMS Saver & Snag Cutter. To achive that I studied the existing designs, and then created my own from scratch in CAD so that it approximately matches the simple triangular shape and dimensions of the Guide part of the snag cutter model. Of course, the filter is slightly larger to provide space for a decent amount of sponge, which is however still about 25% shorter than in the bigger designs.

Due to space constraints this design uses 4x2 magnets (same as Bento Box), four per each filter. I strongly recommend using genuine magnets from Bambu for this, because Amazon ones are slightly cheaper, but often several times weaker.

Since in the basic guide the PTFE tube goes almost all the way through, while in the filter the inner space is occupied by the sponge, the PTFE tube has to be cut 10-15mm shorter than what is recommended in the snag cutter instructions. Like in the snag cutter guide, the PTFE tube hole is threaded on the inside with shallow threads, so it is easier to screw the filter onto the tube than push it in straight with brute force.

For the filter sponge I used simple kitchen sponge. The profile includes a template that can be useful for cutting a piece of the right size using a razor. To make it easier for the new sponge to wrap around the filament it's good to cut a slight notch into it, but it can be tricky.

Because of the small size opening the filter is somewhat tricky. I find that the easiest way is to push the base with the PTFE tube against the filament roll with the thumb, while pulling the lid open with the index finger.