I just dropped Zimmermans a line about how to handle the shipping on a pair of tracks and sprockets. Had an OC-3 went for $1200 at a local action as is. ran okay but needed a little fine-tuning and TLC. had a loader on it. My father owned an OC-3 that he traded for the OC-4. He was a very good equipment operator who could get an outrageous amount of work done in a day with those small dozers. He could do it without beating them to death, too. I'll see about getting pics.