Sturmey Archer 3-Speed Belt Drive

I decided to upgrade my singlespeed belt-driven bike to a Sturmey Archer 3-speed internally geared hub. The conversion wasn’t really easy, but overall, I am satisfied with the results.
Link to Onshape model for the sprocket adapter:
cad.onshape.com/documents/1ac...

[@ditto1958]

I grew up in the 60’s and always wanted a bike with a Sturmey Archer hub. Back then you found them on British bikes that as kids we called English racers. I never did get an English racer, or a Sturmey Archer hub, but I got a chance to ride them a fair bit back them, and they worked well.

[@krollpeter]

Right. I have no idea why they were replaced by fragile derailleurs.
I know Shimano still has some Nexus 7 to 9 speed internal hubs but it's more niche now.