Its very unusual for any car to fail this kind of random plank wear check...infact I cant remember the last time anyone was DQ'd for such an infringement.. With 2 of the 4 cars selected, failing these checks, I wonder how many others would have failed had the whole field been subjected to the same scrutiny... 🤷🏻♂️
Pretty much every Motorsport body does it this way iirc. Nascar doesn’t inspect every car after every race in excruciating detail, they just spot check anything they think could have been manipulated.