Here is my attempt at a purge bin, which is clipped to the side of the A1 mini. It only contains 3D printed parts (no magnets, screws etc. needed).

The build has to be done with some caution, as the clip goes into the grove of the y-axis and the clearance is very small. If everything is done precisely enough a crash is very unlikely and in my case, the mechanism turns out to be quite reliable. Not sure what exactly would happen in case of a crash but I would bet the printer wins the battle :P

Let me know if it works for you!