@Pᴀᴜʟsᴛᴇʀ2 run-in varies from engine to engine

So, I have this intermittent weird clunk / clack sound from the LH rear when going over bumps. This started a little while after I swapped the struts and brakes from the SoS to the GXP.

I took it to a shop on Friday, and they couldn't find the noise. Yesterday, I jacked up the car again and found that one of the nuts on the LH rear strut was loose:

In my defense, that is only visible if the wheel is off and the suspension is compressed. (I lifted the lower control arm with the jack.) If the hub is just hanging, then the whole assembly moved down and the nut was flush.

Unfortunately, fixing that has not solved the clunk issue. I'm at a loss.

And, @Pᴀᴜʟsᴛᴇʀ2 I neglected to try out the new cupholder. I'll try and do that today.

Oh, and my LH front wheel bearing, which I just replaced in December, has gone bad.

I only escaped the "Curbed Wheel", and I don't even have AC so I think it's a check on the last too lol