Bridge / string-spacing question

guitarcookie1

New project incoming: GuitarBuild body with a Strat-style hardtail bridge - they call it standard flat mount with 56.4mm string spacing.

This is fine. I can source a suitable hardtail bridge to fit but..

If I wanted to fit a Bigsby to it then I would need a bridge that has been cut-away at the rear to allow the strings to pass through to the trem.

Callaham do two, one has 2 1/8" string spacing and the other 2 1/16" but which will fit best, if at all?

https://www.callahamguitars.com/bigsby_bridge_vintagehardtailflatmount_catalog.htm

https://www.callahamguitars.com/bigsby_bridge_amstdhardtail_catalog.htm

DrBob

Are the screw holes that you use to mount the bridge to the guitar body the same spacing on both bridges or are they different ? I only ask because if they are the same then either would probably work and it’s as much about how wide/narrow you want your string spacing to be 

guitarcookie1

DrBob said:

Are the screw holes that you use to mount the bridge to the guitar body the same spacing on both bridges or are they different ? I only ask because if they are the same then either would probably work and it’s as much about how wide/narrow you want your string spacing to be 

This is what I’m hoping; will have to wait for the body to turn up next week & measure..

Callaham recommend the vintage version in an email I had back from them so will probably try that one first.