I like your post. Very creative use of the gray stuff between your ears, but you get WAAAAAY too defensive when somebody questions you on any of your 'engineering'. I've noticed it repeatedly.
I didn't see anything at all in Ghoztt's comments that would indicate any kind of negative 'tone'. All he was saying is that these systems are ENGINEERED and had a lot of thought put into them by multiple car companies so there must be something to that. He even agreed that the weak point is the lower vents.
Just because you came up with a new way to fix a flaw or two doesn't necessarily mean the original 'sucked donkey dick' and you shouldn't get so defensive when somebody offers an alternate point of view.
Meddle not in the affairs of dragons, for you are crunchy, and good with mustard.