If times a concern, they could possibly cut down the time by only checking the areas on the teammates where the first cars were found to be infringing, so in last weeks case the board wear.

Sure, a single team could intentionally break the rules using different methods, but intentionally doing so runs a high risk one of the two cars is selected for review and disqualifications not a light penalty, even if it only gets caught on the one car. For a situation like last week where there’s no real indication there was malicious intent, checking just the board of the second car would cover the scenario where the same setup mistakes is being applied to both cars.