Nearly done, bits and bobs only left. sorry about cluttered pictures will post better compairision pictures when weather better.
need bar ends, restrictors, bar tape when happy with set up, and cables tiding up. left brake cable not in photo but same as right set up.
Not happy with gear lever postion (pic1) . I tried it inside on bars right next to right brake lever which was ok to use but it catchs on mud guard when folding ( not enought clearence pic3 and 4). Its not a problem with lever mounted on left. I have seen a left handed 5 speed SA lever on ebay so might get that.

I insintively tried moving the levers to change levers last night several times on a test ride. I am used to brifters on drops. Shame about bromptom lack of gear options. Might consider a Steven perry front mech changer mated to a brifter to get somewhere near this. Like the ride other than the lack of Brifters compatibly
, which I love on my dualdrive bullbared Mezzo.
I suppose i need to spend loads of cash to get this on the Bromnpton to get a 135 rear axles rear frame, and then get the bits. Much sooner put money in to another bike like a birdie where these sort of customisations are straight forward and cheaper.

Really good discovery is that using a Dahon androes stem on a Bromptom does not make the fold any bigger.

ANy suggestions on cable routing??
bar end internal and drill hole near stem for it to exit??
using cable grove on bars requires an acute curve and cable tries to secure under bar tape, not sure about that one either.

SHould I use bar end levers??? (might look better but dont want to lose hood hand postion )