This is a B extension that I fabricated on a Christopher bass. The player was most insistent on the B, and I went against the advice of some esteemed luthiers to make it.
I know the arguments against the B, but according to this player, who is a university student, he won't even be allowed to audition for some orchestras without a B extension. I could not turn him down
.
As it turned out, the functionality of this extension is very easy and the Bass Capos from Rob Anzellotti are very well made.
Thinking back I was wondering how many tools I used to fabricate this extension which is solid ebony. I came up with between 60 and 70! This includes files, planes, knives, computer for calculations, drills, drill press, measuring tools, etc...
The design is deliberately austere, without fuss, with a tip of the hat to Arnold and Jeff B.