Just got an amazing 62 jazz bazz refinished in late 60's. Of course I know it's gonna have a hum, and i know it's grounded to the bridge, but I was singing at rehersal, and I got shocked all night long!!! And the buzz/hum between the PA, and my amp was way too much. Is there any way to resolve the shock issue, and eliminate any unnecessary hum? Thank you for any advice..