righto, glad it worked out for you. its a cheap trick, but to solve pretty much all of my grounding woes with my jag-stang(same setup as the mustang) i just took the snip from a high e string and shoved it under the bridge plate to the control plate grounding both. its a cheaters way, but its relatively hidden since the plates almost touch anyway, and the guard is right there to sneak the string under.