[Graham]

Just to be clear, who is it we are competing against is this proxy, is it other cars in the "Event" or other cars in each "Class"?

It is basically the same as with the Rally Slotting Proxy.

An award for 1st, 2nd and 3rd cars in each of the 4 "Events or era's" regardless of Class type.
An award for the fastest car in each Construction Class A,B or C across all 4 Events.

A Best Team award for the combined points results from both Events & Car Construction Class (50% each), but you had to entered 2 cars per team to qualify.

So in essence you are competing both vertically speaking "to be the winners and runners up in each Event". And horizontally across all cars with a similar construction, for a construction Award. And finally the combined results of two cars if you are entering for the Best Team Award.