I just got a used Sea Ark 1660 with a prop tunnel and a 60 Yamaha. The boat has a jack plate on it, a TH Marine Hydrojacker six inch setback model, but the previous owner appears to basically be using it as a manual jackplate because all the wiring is cutoff just above the plate and there are no trim switches anywhere in the boat. It's my understanding that the actuator is all integrated into the plate, and is 500 dollars to buy the assembly to replace it. I'm wondering how much of a necessity a hydraulic plate is. I'm running skinny rocky saltwater creeks and I'm thinking it might really help me jump out of the hole and move in shallow water, and maybe help reduce lower unit and prop damage when I inevitably find a rock with my lower unit. Is the jack plate something I'm really going to appreciate? Is it worth looking into repairing the plate, or should I buy another new unit to install, and if so which one?