So, I had been on RP's side through this whole things, because I thought Brake Ducts were added to that list pretty late last year, and we all know design of the following year's car starts way early. That and given they received the CAD drawings early enough for that to be legal.
But apparently that rule was announced in April? So I assume they had time to change their RBDs. Not sure if they even had a full RP20 design at that point?
But again, how do you tell someone to ignore a design they already have that at the time was legally obtained? Could RP not produce any RP20 designs with the W10 RBDs dating before April whatever it was?
It's a very strange and weird situation, and I think the penalty is hard to praise or complain about.