Used a John Deere 650 bulldozer and and Komatsu 220 excavator. The bulldozer was about 11 tons and the excavator was 22 tons with s 22 foot reach. Learned alot; it's more than just a hole in the ground. Bulldozers are slow, but let that blade go to deep and it will throw you out of the cab. The excavator you have to watch when working in water; the mud splashes and splatters, and it has stones in the mud...smash out a window pretty easy.
