If you don't have any space on the left side of your printer, you can print a poop box to go behind it instead.
This is a larger version of the original poop box with more space for poop, but it is still slim (50mm deep).
UPDATE - VERSION 2
From feedback I have received and my own observations. the model has now been total redesigned and the wall to catch the poop has become bigger and catches better, so that it does not end up behind the poop box