The easiest solution is two sets of rims and tires. As far as tire choices for you, I'd say NT01's for the SCCA autocross events and I cant remember if the 200 tread wear Nitto's were 05's or 555's but one of those for the PT events.
Yeah I know, not cheap, but if you spend it now it will save you some frustration later.
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Gaetano Cosentino
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