At the Kiddy regional it was Z3. I actually has the Wedge squared on the front too but they were Z4 (as I can make anything understeer).
Was a good dry day. Yes the lap time was about a third of a second slower out outright fastest lap but the tyres were a lot less 'grabby' so less tendency to grip roll and made it easier to drive. Less stressful to drive with.
I've used Z4 at Kiddy too but only on a vintage 2wd. Great grip and last a fair while but obviously it a lot less demanding.
Not tried the Pyramids.
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