I used the original part for 2 months, but now I need more space behind my printer.
So I created these two versions based on the original design.

Changes:
- Thinner walls (1 mm and 1.5 mm versions instead of 2)
- Simplified geometry
- Reduced width (50 in original, 30 in remix)
- Steeper slope angle 

P.S.
DON'T USE THIS PERMANENTLY, only if you need something for first months.
this models didn't solve the problem with poop stuck. 
I think the poop doesn't have time to cool and eventually gets stuck.