I have ran bush hog type mowers for well over forty years and currently run a seven foot and a fourteen foot model. Both run two blades per disk. I have a buddy that bought a fourteen foot years back with four blades per disk. We both run about the same HP tractor on the mowers and mow pretty much the same ground a lot of road ditches, CRP and field edges. I can's see where the four blade does a nicer job of mowing the only thing I see is when he hits something in the ditch or just from wear he has twice as many blades to change and buy than I do. He said the next mower will have two blades per disc again.