This seems like a good price on an aftermarket telescoping seatpost for the Brompton.
XL Brompton Seatpost
Plus it eliminates the need for a pentaclip if I want to use a regular saddle. I could probably get decent setback in the saddle adjustment from it. Anybody know of it? Arguments for or against? I am tall and I want to get a little more altitude and stretch in my riding position.