That’s a sweet looking around towner! Love the Paul levers – are those prototypes?
I get the flip-flop rear, but do you “shift” manually between the 2 cogs on the one side?
The rear ENO hub from White Industries has an eccentric axle. This is where I am able to tension the chain. To switch gears you loosen the axle, move the chain over, re-tension and tighten it up. THis build has two freewheel speeds and one fixed, all with roughly the same chain length