Is the adjustable baffle feature something that you actually use, or do you just leave it wide open all the time? I'm looking at getting one of the new Z400 series ZTRs for a large residential lawn (also looking at a JD 717A or 727A), and I am wondering whether this feature is a good reason to move up to the ProValue (Z440) model over the estate model (Z400). My dealer was telling me that almost none of his commercial cutomers using the Turbo Force deck ever adjust it. According to the dealer, the Z400 deck IS a TurboForce-style deck with a fixed baffle (it sure looks that way to me). I know there's a number of other significant differences between the 400 and the 440, but I'm just wondering if the dealer was trying to sell me the Z400 he had on the show floor (he didn't have a 440), or whether he was just trying to save me some money. BTW, I know the Z400 is brand new, but if anyone can compare the cut quality of the TurboForce deck and the JD 7-iron deck, I'd appreciate hearing about that too. And yes, I will demo, demo, demo... ;>) Thanks guys. Rich R.