UPDATE:
For any who downloaded before 9/30/22, please download the new version. The offset wasn't applied to the secondary sketch, causing an impact on the flap mechanism. I have applied the offset which should fix the issue.
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My ice chute fell off. Figured out it was a small retainer tab at the bottom that snapped.
Designed this to be printed with the circular opening down to give the clips and tab the best strength. I did have to file down the little protrusion from the tab, but I wanted to to be snug.
I found that moving it into position and pressing the tab in first is the easiest way. Just file down the little tab nub until it snaps in, then the clips up top with pop right onto the arm with minimal effort.
The author hasn't provided the model origin yet.