I have a similar tailpiece for the RC12 I'm just starting on. Mine's straight, but my problem is the fixing holes; if I position it with the strap-button hole in the centre (which, surely it has to be), the top two screw holes are right on the edge of the body top and therefore unusable. If I drop it enough to give the top two screw holes enough wood to bite into, the strap button hole is perilously close the bottom edge. The earlier (I presume) pattern has the three holes in a straight line, which would work perfectly. I can't see a workaround other than buying a tailpiece that actually fits the guitar.