During my factory visit towards the end of last year I saw the ARP4 being built with the red chassis.
Then there was a discussion on the forum about why Morgan had changed from a Galvanized chassis. If I remember correctly there were two main reasons given, the first because the new system is lighter and secondly because galvanizing the chassis causes distortion.
I think both are plausible reasons but something keeps telling me its all down to cost, I figure Galvanizing costs a lot more and its all about bottom line.
Peter