Yup, I found that after breaking it. Drat. I could have just taken the whole thing in and had them figure out what was wrong.
It was the belts by the way, I learned how to fix them myself, so at least I have that going for me, but in the process broke the piece.
The pool person said it is pretty common though, that piece gets very brittle. I was told that for now just put some tape on it and cut two slits on the sides. So I will go ahead and do that until I decide to get the thing gutted.
Only difference is I can buy the piece online for the price linked above, or they charge $90 for the same thing.