On a sprint weekend, the planks undergo 19 more laps of wear than at a typical event. In this case that’s almost 65 more miles of racing on the same plank. Holding the ”randomly selected cars” to the same floor allowance as if it was a standard race weekend but then NOT checking all the teams when you have a 50% failure rate is just plain wrong. Either have a different allowance on the sprint weekend, check ALL the cars or don’t check at all.