I would think the control tyres are for everyone, but not completely sure, also not sure if it's front and rear and whether it's pins or spikes. I know the spikes worked well in the wet, never tried pins though Grant used them to good effect at the East of England Regional in the dry.
I know I will be racing in the open class though it will be interesting to see how much slower if at all the 19 turns are. Maybe later in the year when its colder and wetter a 19 turn will have the advantage as it should be easier to drive.
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