Ok so i have a VS datejust41 mint green with Gen balance wheel & bridge. it was running -11 and the amplitude was a little low. i tried if fix it myself by turning the weights on the balance wheel and fucked everything up. Who are some ppl that can service it and how much is it? i would really appreciate the help.b Another thing i want is a glass/sapphire case back for the DJ41. i like to see the movement. anyone know were i can pick one up?