Lot's of fettling really, and also admitting that I didn't have all the answers and handing it over to Sam at LMNH, who (amongst other things) spotted that at some point chain-suck had FUBAR'd the rear mech cable which I'd not noticed, but which was fucking the shifting, etc etc.
Lot's of fettling really, and also admitting that I didn't have all the answers and handing it over to Sam at LMNH, who (amongst other things) spotted that at some point chain-suck had FUBAR'd the rear mech cable which I'd not noticed, but which was fucking the shifting, etc etc.
Put simply, it just works now.