If the holes match up, then feel free to screw down the Bigsby's backplate. If they don't, then don't go all willy nilly drilling new holes -- use a fender washer under the strap button to hold down the backplate. (fender washers have nothing to do with Fender guitars, it's a type of washer) Between the strap button screw and normal string tension, the Bigsby won't go anywhere. Make sure there's some felt or something glues onto the Bigsby tailpiece wherever it makes contact with your guitar's body. I'm not sure if they come with the felt already on them or not.