I've got 1 of the last 4660s made. 80' booms. Spray 8-10,000 acres a yr with it.  Have Trimble Autopilot & EZ Boom. Bypassed the Raven, & swapped the valve solanoids to 12V& .  Best day was about 1000 acres Alfalfa.. Lot of 6-700 days. Keep a man in the water truck.

Light , Nimble, & sips fuel, fuel tank is small, have had to fill again on good days but I think it's only 44 gallon.

Parts should be good , GVM is building a KNOCKOFF now..