How do they handle roots, sticks, etc...? What happens when you hit an old stump or rock: shear a pin? bend a tine?
I have a Bush Hog RT88 road construction tiller with a slip clutch. Disc fields early September, hope for rain to germinate the wild ryegrass, seed the plots several weeks later, set the tiller where it cuts an inch and turn the seed, level the dirt and kill the grass at the same time. If you have sandy soil it will need to be packed because tillers really fluff the dirt.