No, it was on the Sunday morning warm up lap and just one of those things. The rings were new(ish) but the piston was old.
It's not a big problem there, the Snett back straight isn't as long as it was and the front straight is up hill and now has a very slow entry.
Besides, it's just a trackday, there's no reason to hold it flat in 6th for miles and if you're running stock 21 gearing it wont get there anyway.
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