I only know Dahon system... but if you want to do it yourself, do it better than theirs. On day 4 of my new Dahon Vitesse D5, the magnetix parts fell off during normal riding, and I lost pieces.
The front piece is screwed securely and it doesn't move. This can still become loose during normal riding. They should've used a clip, spring, or something to push the screw against, so that the vibration wouldn't loosen the screw. The front piece is magnetic metal, but is not a magnet by itself.
The rear piece is loosely mounted or float mounted by a screw with a spring so keep it straight at unfolded position. This gives some flexibility in the exact position of connection with the front piece. The rear piece is a strong magnet. This piece actually fell off during normal riding in my case.
I wrote Dahon to ask them to send me replacement parts, but I didn't hear back so far. Their response doesn't seem to be as fast as their bikes.
Last edited by megaptera; 09-05-06 at 11:00 PM.