I have a DR tow-behind tiller that I pull with a garden tractor. I don't recommend them. I've had numerous issues with it. It's not heavy duty enough and I've had broken metal parts that I've had to repair. They take a real beating from vibration. I'm pretty sure it's a rebranded Agri-Fab but I'm not positive.
One issue is that there's a bent 3/8" rod that's used to lift the tines (actually it lowers the wheels, lifting the entire tiller). It came with flimsy kotter pins in both ends holding it in place. The vibrations ate through the keys and let the rod drop out into the tines, turning it into a pretzel. I got a new rod and replaced the pins with heavier hairpin clips that I check regularly for damage.
