gcv, good testing mate, I had pondered the same question once, grumpy's comment about a cleaner cut on the grass blade is what I found and at lower rev's too. On fine leaf buffalo it doesnt shread or feather the end of the leaf so much so then you dont get as great a "brown" tip effect in a few days. It will be interesting to see if you notice any difference over the nxt few days / week of the various blade types.
