With three teeth it seems to leave way too much dirt in the ditch when raking the bottom. It is harder to grab the smaller rocks and stone. I also think it puts too much stress on the single tooth when prying up rocks and it is also harder with a single point of contact. I cannot understand why JD did this unless to save a buck or two. I am sure the driving force of three teeth is better than four but I bought a small tractor with a small backhoe and I can live with it's limitation. Heck, my old #7 had five teeth. My plan is to grind off the center tooth and weld two new ones on.