Yeah, the Bikegang kit basically
The Bikegang photographs on the website you linked to show it being used with the Sturmey Archer SLS-30 shifter, which looks like it would provide indexing for the middle sprocket.
which looks like it would provide indexing for the middle sprocket.
it doesn't IRL.
@sbbohr started
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The Bikegang photographs on the website you linked to show it being used with the Sturmey Archer SLS-30 shifter, which looks like it would provide indexing for the middle sprocket.