Great design The only thing that might make it nicer would be a way to use the spout to pour from the sorting tray after you have already poured out your selections. Maybe some sort of removeable gate?

Can't find any fault with this design, aside from the possibilty it may not be strong enough to withstand a lot of abuse. The savings in filament in my case seems worth it.

Simple design works well.

Works for me but only if used under both sheets at once. That makes the sliding lock a bit snug.