[Graham]

I’m asking because I truly don’t know…..is it possible to share the same numbers as a builder running in 3 classes, or is that a different mess for a track host?

As usual the 3 Events will be run separately, and should have mostly different cars running in each event. So basically there is only an issue if you have 2 or 3 Volvo Estates or perhaps Camaro 69’s entered with exactly the same livery and number in one Event. Otherwise all other cars with different liveries but perhaps the same number would not be affected.
It is best to get your cars registered early and then we will see if there are any number issues to resolved.