Electrolux connection ring

UPDATE: i´ve uploaded v2 stl that had better result, even when first version is a perfect copy from original. I also rotated piece on stl to avoid requiring support

I´m becoming very poppular between my work mates :) This time a collegue ask me if i would print an spare part to repair he's broken vacuum cleaner.
It wasn't a challenge, but it made the trick, what else?