I completely agree with every you have said. And just reiterating that this was more then just a turn down tip exhaust issue/remedy. I would venture to guess that 99.999% of guys with 2020 that would entertain the idea of aftermarket straight out tips, would never experience a CO2 cabin infiltration issue. And again... if the turn down tip was the fix, forget anything else they are doing as part of the customer enacted enquiry TSB (note it's not a full scale recall.. yet) how would they avoid "sitting still" infiltration? But as you said, the 2020s design was probably one of many things they did to try and avoid the hauntings of their past... we can only HOPE!