I'm thinking about getting the piezo saddles from GraphTech for my Carvin B5, and there are 2 issues I need to resolve. The first is, can these saddles be flipped upside down and work the same? My bridge has some of the screws to the left of the string, and some to the right, while the GraphTech ones seem to be all to right. They look flippable, but I cannot tell with certainty. The piezo wire might come out of the bottom of the saddles, I can't tell from any pictures. Secondly, My string spacing is 17mm, while these saddles are 15.9mm. Would this be an issue? Would I need shims in between the saddles? Thanks for your help!