Hey Markus, Tracy G. here. Good for you, guy! Glad you stood your ground, "cheeky bugger" I laughed at that!! As you can tell, many folks won't understand this mod at first. I Have not done anything yet, I'm applying for my Personal Liscense this week- but I am sure other Gadgetmen/Gals have faced this situation already and can offer advice about a quick explanation that everyday people can understand. I believe I understand the basic priciples involved here. I think I might say, " the Groove changes the airflow dynamics inside your engine so that all or nearly all of your gas will burn INSIDE the engine. Power increases, pollution decreases and your engine consumes less fuel due to being more efficient." Lets see what the other good folk here say, but I say Bravo, Markus!! Tracy G