Hi, the great thing about this list and Wooljersey is that you learn stuff.
Last year I bought a bunch of stuff amongst which was a BSA double
chainring - no cranks. I had a pair of BSA cranks so after I'd cleaned the
crud off the rings I tried to fit them together. In the usual way, mind.
Threading the crank through the hole to bolt up the flange on the inside. It
went through but there was no clearance for the chain. The inside face of
the crank was touching the outer ring. The only 5-pin crank in my stash to
fit is a Gnutti splined type. Now I see from Pete Naimans' BSA that they fit
the crank flange on the outside face of the inner ring. Who would've
thought!! It's unrestored too which adds weight to the solution.
Mark 'Enlightened once again' Stevens Evanton Scotland