I searched for Rail to mount a Trofast Drawer from IKEA in one of my shelves but didn't found the correct one for my needs.
So I designed my own Version to use a Trofast drawer as a poop chute.
The Trofast Drawer I used is the smallest one but you can use it with every version/size of it.
Length of the rails is 28cm.
in the pictures you can see how I combined it with a poop tunnel I found on printables.com
https://www.printables.com/de/model/735220 (link to the poop tunnel file)
It's printed with a Layer height of 0.20mm, 0.40 Nozzle and 15% infill with the standard infill pattern.
I used eSUN PLA+ for it and it worked great.