I have an old loose ball one used in my similar quad crank experiment .. (want it?)

and you have not tapped into Phil Wood Co's range of BBs, as you just saw,
for tandem rear cross over drive there is need for a wider one..

I have one of those too .. I can trade it for a shorter one with you ( I can press the Spindle out
or trade it with you dor a shorter one that I can use when my 'unxx' 127.2* needs replacement)


Phil's Cartridge BB mount with 2 threaded Rings .. made in all sorts of threading types .. in California..

*Its what I have now to get A Rohloff Chain line..
got the phil in a trade with someone else.. so it Goes.