So I actually bought this in part so that I could leave you positive feedback solely on the principle that many coffee grinders are notorious for having parts that fail that cost half the price of the grinder to replace or aren't available at all (at least not easily). Anyway - I noticed before ordering that the little tabs that hold the ring in place weren't in this part but I figured I'd try it anyway. Initially It didn't work. As @samplewis
said - it sort of just sits in there. I'm so glad it worked for them right away. For some reason on my unit once the hopper was placed on top it wouldn't turn and thus the grind size couldn't be adjusted nor could the hopper fit in place. This could just be a rare instance where it wasn't cooperating. Nonetheless I resolved the issue in less than 5 minutes. Thanks to the extra thick ring I was able to melt the plastic in a few spots and make the little tabs myself by pressing the melted plastic over the metal burr. And BAM success. It worked as soon as I installed it. I'm not quite ready to say there's anything wrong with the design. Like I said it may have been a fluke , but I wanted to make sure and give you some honest feedback and also let you know I appreciate you making this part. Now I'll try and add a photo :) Forgive the dirty parts I took the photo in a hurry. Thanks again for saving my broken grinder!