I am the proud owner of a Brompton bought second hand. It's the S2L model (flat bars/2 speeds) with a Brooks swallow saddle. Paid $900 cash for it.
I noticed that my Brompton's headtube has a welded on metal piece meant to engage with one of Brompton's own plastic braces so that you could attach bags to the bike.
Does anyone know if this system is compatible with the Klickfix system, which is used on some Dahons?
If not, perhaps someone makes an adapter that converts the Brompton system to a Klickfix one? I'm hopeful but so far a websearch have yielded nothing.
It's been raining here in the SF Bay Area so I have not been able to do a ride on my new folder yet. It seems well made.