Another noteworthy thing about the Rick pictured above? Evidently the horseshoe pickup was getting in Sir Paul's way, so it was removed.... with a hacksaw! This photo seems to be from a time when he had effectively disabled the bridge pickup because of that little move.
Whatever it takes to get the job done! This is common knowledge? I've never heard that story until now. Was this done after the Beatles in the Wings era..or are you pulling legs here? Wouldn't doubt it, but some documentation would be nice.