I bought a Toto SS114 seat for my Drake II and it arrived today. It's made in China and very floppy. The seat's mounting flange is bolted to the bowl securely, but the seat and lid are all floppy and move independently from the mount. The seat easily moves around when in use.
It seems there's lots of play in the hinge, allowing the seat and lid to flop side-to-side, even though the seat assembly is tightly bolted to the toilet.
Is this normal?
Here's a video of my new seat to show how much it moves around.