I've got the 48" deck and right now I have it configured with the factory mulch kit and stock mulch blades. As compared to using the bagging setup, it seems that the deck now has zero vacuum(which is understandable). What I mean by this is the mower will now leave patches of uncut grass. It's almost as if the grass gets laid down by the wheels and while under the deck, the grass stays down. With the bag and power flow vac assembly, I believe the vacuum created stands the grass up straight and results in a much superior cut. Is this just the nature of mulching? Would using different blades help? I'm aware of the 1/3 rule when mulching but still I'm getting poor results. I'm actually considering putting the bagging system back on and leaving the bags off and just letting the grass clipping fall where they may.