Callaham Guitars has recently added some cool upgrade options for Bigsby vibratos that fix some long-criticized design features on the Bigsby. The accessories are functional and add Callaham’s signature precision machining and premium materials. I’m installing the upgraded string shaft and front roller on a B-5 vibrato tailpiece. I’m also installing the upgraded Bigsby on a Suhr tele, which requires modifying the Wilkinson bridge to accept behind-the-bridge stringing. Callaham offers a beautiful bridge upgrade for teles that does the same thing, but modding the Wilkinson only takes about an hour, making it a little more affordable than the completely custom-machined Callaham.
The first step is swapping the string roller. Just loosen the set screw and the roller pin taps out easily.