I just completed the survey. I also completed one that you linked to from another thread. I'm not sure if that was the same one or not, so make sure I'm not double counted!
Thank you for doing all this work to sort out the problem.
Edit: I see from a prior post that I was already counted, so I shouldn't have filled in the survey again. Sorry! I'm the one with the ST builton 8/14 that clunks, and doesn't have the reinforcing plate.
Also, I have put a piece of thick, heavy duty double sided tape under the rubber piece that supports the coolant reservoir, on the off chance that the noise I'm hearing is the reservoir clunking. I haven't driven the car since I did that. I'll report back with the results the next time I'm out.