Anybody have a date when the hydralectric was introduced? My old employer always said two of Oliver's biggest goofs in one year was the wiring on the first hydralectirs and the model 8 Baler. Does anyone still have a 3 hose cylinder as the Super 99 and 900 series tractors used or a group one hydralectric cylinder with the "fingers for adjustment instead of the magnet?  Also when was the 66 model introduced?