I recently picked up a nice 6 speed Brompton (owner says bought in 2012) with Ergon Grip Handlebar Ends and EaZy-wheels upgrades. The gentlemen also upgraded to a smaller sprocket for hilly terrain (he'll ship me the original).
The reason I got a Brompton was really for compact-ability. I can put it on the front seat of my truck (on the floor), and wouldn't have to leave it outside if I biked to the office, and look forward to taking it on a trip or two when I travel (there is plenty of material on that on this forum)
I am just a hair under 6' and weigh 210-220lb depending on the season and time of day
As soon as I jumped on it I knew that I probably need a bit extra height on the front wheel and most likely the seat, as my leg doesn't fully extend when I ride, and i feel too much pressure on my palms as I ride (I had a similar issue with the Downtube that I own, but never got around of upgrading, primarily because I stopped riding it for longish (5mi+) distances.
I saw the Aber Hallo recommended (which was also recommended for the downtube when I had similar complaints)
Aber Hallo Stem
I searched the forums, but couldn't confirm.
1) will it affect the fold-ability of the bike?
2) do I need to modify any cables to add it?
I think I would like to take care of the handlebar first, before moving on to the seat. On the seat side it seems like it's pretty straight forward to get the telescoping seat post (to avoid losing portability with the extended one).
I know someone will ask for a pic: