Great questions. Let me try and answer them here...
I was going to rotate them front to back. I'm not toally sure what a staggered setup is, but thought it would be possible as the tires are currently the exact same size on the front
and the back, just different models of tire. I could easily be missing something though.
In theory the shop that did the alignment and road force balancing was a pro tire shop,
Wheelworks here in San Jose.
Date stamp is 17th week of
2021, so under 4 years old and visually in great shape. I haven't tried the 9/3, 12/6 test so will look into that.
Is this something that can be done visually? Or needs to be done by a tire shop?
Thanks so much for the update, I'll be eagerly waiting to hear your results, I had considered this as a potential fix also. How much is that job going to run you in parts?
Thanks again everyone for the help!