This poop chute can hold SO MUCH POOP!

This one is designed with alignment tabs and four spots for 10mm x 3mm magnets to easily place it without having to either look or feel around the back of the printer. It also sits on your table so no worrying about the box sliding down. The printer facing side of the magnets are exposed to help with magnetic strength. Only downside is you'll have to glue them in place. I recommend any generic gel super glue.