Hi Marsu,
they’ve claimed that several times, no fish…
But you might ask Ming, I’d be very curious about their official reply 
At the moment I’m looking for a laser cut company which could manufacture a reliable stainless steel spring for the folding mechanic.
The potentiometer replacement (and recoil spring mod) will be definitely much more work.
I mean the cheap poti should be replaced at this opportunity by a sealed hq version (even if they are very expensive; ~ 15 € each).
This weekend we have a very big bike event here in Vienna:
http://www.bikefestival.at/
Yesterday we contacted again the HP sales manager;
he promised to appear tomorrow with the company-owned Brompton (hiddenpowered of course).
So, I’d recommend to hurry up for meeting us tomorrow afternoon at Mike’s booth Nr. 50!