How do you ID an original lightweight tailpiece? Bought a 70 Deluxe that was already fitted with a lightweight, nickel part when I bought it. The tails finishing is uneven in places (i.e. a little bit out of square in places)and has grind marks on the base of the feet. It doesn't look particularly new, or really old, but seems to fit the criteria that I've seen dotted about the place. Any info from the tech-heads would be appreciated.