Just one question how did you balanced them. I assuming you removed them from the carrier to sharpen them. Still learning these swing arm cutters the Aussies use for walk behinds. Here the smallest setup like that which I sharpen was my 4 ft bush hog rotary mower. I even have welded new tips on mine due to all the rocks impacts and then ground back into a cutting edge. The added weld material is actually harder than the rest of the blade.
