Simple, and crude, modification of original Bambu drawers. The original was built for the X1C and the P1S/P1P are about 3 mm smaller in depth. So you can either slide your P1S back so your poop chute magnetizes properly or use mine that has been lengthened by about 5 mm.

I also made it so the magnet slots can hold 2 each because I got weaker magnets and didn't want it falling off.