All you need to install a Bigsby B5 without modification
Vibramate V5 (Aluminium)
Now you can install a Bigsby Vibrato on your guitar without drilling any holes! The Vibramate V5 Model Quick Mount Kit is designed for a Bigsby B5 Original Vibrato and will fit most traditional style guitars that have a tune-a-matic style bridge and a stop-tailpiece.
The kit installs in minutes with the included hardware and eliminates the need for drilling permanent holes in your instrument.
Vibramate comes with 3 felt-pads secured to the bottom of the mounting plate for a soft touch to the top of your guitar.
Vibramate automatically positions the Bigsby Vibrato in the proper orientation and makes a very clean finished appearance with great performance.
The Vibramate Quick Mount Kit includes both English and Metric threaded mounting hardware for either US or Import model guitars.
The Vibramate V5 mounting plate was originally designed for flat-top guitars but may also work on a variety of carved and arch top models that have the same standard tune-a-matic style bridge and stop-tailpiece setup.