I agree Norm, having that spinning mass makes such a difference. A good example is the little gxv120 on my slasher - 120cc doesn't sound like much but the big jetfast round carrier means it will slash really well.
Put a straight bar under it and it would probably die on the first thick patch of weeds
That being said I am keen to get my hands on a FC ute and give that a crack - probably go twice as well
