The sleeve drive will be a duplex chain, and like all chains it needs tensioning. Like old Notions the tensioner is ally, which Bob has made a great job of carving out of some leftover billet. It’s a lovely looking thing, the sort of artifact you’d pick out at an autojumble just because.

Shame no one will see it when it’s in situ! Apart from the 44T sprocket, all of the steel components are finished. Time to give Dave a nudge about finishing those patterns!