For El Ray, yes, either B3 or B11. Both are designed for thin body or semihollow guitars with a floating bridge. The difference is the tailpiece cutout on B11 ( no Bigsby logo ). I assume the top of the El Ray is arched, like a Les Paul, right?? If not, a B7 might be your other option, depending on the space between the bridge and the bottom end of the guitar. Best way to choose is to take your guitar to a music store that carries Bigsbys. The only mods involved are the screwholes you'll need to drill to the bottom end of the guitar to mount the tailpiece. The vibrato you'll achieve with a Bigsby is subtle compared to say, Floyd Roses etc. so no "bomb diving" on a Bigsby
