In article , Chris Eller wrote:

Something that may make this a moot point; mt main electrical box has bonded
neutral and ground bus-bars. So, any improvements I make up the line won't
really help as the box is old design. Probably have to replace the box as
well.

An I on target here?

No. Your main panel is just fine. The NEC *requires* the ground and neutral
bars to be bonded at the main panel, and *prohibits* *any* connection between
ground and neutral anywhere else.