I just found out I was Tier 2 about a week ago as well. They didn’t ask me for medical records. All they wanted was VA disability break down and Military personnel records. I had mine sent electronically to my POC instead of waiting for them to get in the regular mail and possibly losing it or something.
What "personnel records" did you send them? When I think of personnel records, the only thing that comes to mind being prior service is my DD-214.