I picked up a 1460 last week, and I have a couple of questions. First off it has a rock trap and we haven't ever run one. Anything special about them and how do they work? How common was hydraulic fore and aft on them? Why only 2 lift cylinders? Our 1440 has 3. Will it lift a 6rn head ok? Does anybody know the part numbers to convert an 820 cable head to electric AHHC? I would like to update heads but that will probably be next year.