I think every philosophy involves tweaking. I agree on the planet theory for DT's, however the 6'5 270 lb DL used to be more of a rare occurence, and so it made sense philosophically to put a premium on those guys. Remember back when we used a 6th rounder on Rufus Johnson? That was a time where you might find 3-4 of those guys in the draft, so you took a shot.