You may be interested to know that there is now a Strida only shop in Amsterdam, it's the only one in the Universe! They have the new modified frame III's there (there's a small roller just behind the back pulley which stops the belt from jumping even when the belt is not too tight.
They supply Stridas with TomTom Go navigation fitted, I had my Strida III upgraded to spoke wheels with chrome hubs.
They are about to get coloured Stridas (Gold or Red) & are investigating a gear system for Stridas too.
They seemed very busy and said that they'd sold heaps since they opened in January.
Strida Shop in Amsterdam
or see pics On my Strida page