Clamp on brakets to use a braze-on FD, angled and offset a bit, because, on most folders,
the seat post passes behind the BB.

The bracket includes a cable housing stop,

IDK where the housing stop is on an E type to pull the derailleur.

I think it's on the frame, on the bikes that need that FD.

not too difficult to braze bracket together once the materials are gathered together..