thanx man... i used to be a painter at a bus factory, and this is some abs plastic which i scored while i was there...put it to some good use......knew id use it sometime....quit the bus factory 2 yrs ago...but i just drilled some real little holes thru the duct work and a small hole in the top of the dash, the opening has a lip on it, so i cut the piece to fil inside the lip...to attach it i used a small bead of silicone, if i wanna remove it it will be simple, and there is no fastners showing