Hey Matt,
I'd love to organise a national gathering of some description at some point. I still think the Muscle Car Masters is the obvious choice, given the central location, the great field of group A and C cars they get and the event in general. I sent an email off to the organisers of the Muscle Car Masters and received quite a positive response. They were willing to give us a dedicated area to present the cars, and with some negotiation I may have been able to organise a parade lap or two.
Unfortunately due to short notice and a lack of numbers it didn't happen this year, but with a bit more forward planning, perhaps we could organise a gathering at next years Muscle Car Masters to celebrate the 25th anniversary of the RS500?
Paul.