I am just curious and have never asked, but what is the reason for high lift, med lift, and low lift blades. I understand that the high lift generates the most lift for the gass towards the deck, will these high lift also be the best as far as moving the grass towards that exit of the deck. The mower inquestion is a grasshopper with a 60" deck. I run gator blades now, but at almost twice as much i am looking to change to the straight blade set. Since i dont mulch with this machine just blow i dont see the advantage of the gator blades. The only reason why i was running them is because when i first bought the machine i intended to mulch with it, but was not happy with the mulching performance. Anyway i mow in fairly sandy condions and i was wondering if the low lift blades would reduce wear on the underside of the deck.