Just spitballing from the builder - but I think you can prossibly FIT a B5 or other stop-tailpiece Bigsby, but definitely NOT a B7 style (endpin/archtop style). The B5 does look like it needs some flat after the stop tailpiece studs, and the Musiclander has a couple inches - it looks like there's about as much room between the bridge and tailpiece as between the tailpiece and end of the body. I wouldn't give up without asking - maybe over a TDPRI or some other forum.