Anybody know much about the old Case tractors with the Hydra-Drive? I saw an old 446 with original Onan engine on Craigslist for $1000 with a no-rust mower deck. It looks very heavy duty and people on the internet seem to love them. I love the huge back wheels and tires. My main question is how tight is the turning radius? A coworker of mine has an Ingersol tractor which is the newer version and he loves it.