Going to work tonight I was able to hear all the repeaters (except for Concord which is down) and signal strength was good.
North of Harris Blvd Charlotte, Mooresville, Dallas and Mint hill were all full strength. A little further up the road the signal strength on all the repeaters was down to S3 but still receivable. Then just before the Giliad Rd exit 23 signal strength was full again on Charlotte, Mooresville and Dallas.
Inside the Huntersville business park all 3 repeaters could be heard but Dallas was stronger than the rest.