Yes, be careful about rollover. I learned the hard way and rolled mine. I had a bucket full of dirt about as high as the hood, and that combined with the backhoe on my bx-22 raised the center of gravity enough that when I hit a small bump of dirt while driving sideways on a small incline and , here-we-go! roll-over! The key issue is wear your seat belt any time you are on uneven or unlevel ground.
Now, as far as leveling a slope, i just leveled a 20x20 area for a swimming pool for a friend of mine. The dirt was dry hard clay, and the FEL would not cut into it even with a toothbar. I ended up using the backhoe to loosen up the dirt in a bunch of small semi-circles, then scooping it up with the FEL to make the pile. It took an entire day, but looking back that was probably not that long.
Now, as far as leveling a slope, i just leveled a 20x20 area for a swimming pool for a friend of mine. The dirt was dry hard clay, and the FEL would not cut into it even with a toothbar. I ended up using the backhoe to loosen up the dirt in a bunch of small semi-circles, then scooping it up with the FEL to make the pile. It took an entire day, but looking back that was probably not that long.