Review on Single Hand Mixing Valve Ceramic Cartridge by Chris Hernandez

I'm glad the cartridge has a spare bracket and screws, but the teeth on the side of the cartridge don't line up with the groove on the hub. I have searched the internet for several photos and all the photos only show teeth. I even called Grohe and they couldn't help without a model number as the cartridge is used in many of their models. We are the second owners and the soul is around 20-25 years old. I ended up using a dremel to groove the original bushing to match the teeth. It fits and works well. Improvise if there are no other parts.