As far as I know it's not really possible to cut a full 3-4" off the ground without lifting the scythe, even with a very broad blade and an unpitched tang. I imagine you could modify a blade for the purpose by attaching a prop of some kind to the blade to elevate it, but I've never seen such a thing done. Indeed, the holes are for adjusting the hang of the blade, which allows you to alter the depth of your swath without changing your stroke.