I took Adrian's good chute and modified it to meet my needs. A bit wider, with a curve at the end to fling the poop to the side a bit, to fit my setup. No supports are needed. I printed in PLA on the textured PEI plate with no brim.
Model has spots for 5 magnets (11.9mm x 3mm) that i had. https://www.amazon.com/gp/product/B09T9DVVFT
2023-03-05: Replaced .STL with properly scaled file.
The author remixed this model.