Yes the twin cable system is cheaper than the Sea star hydraulic system. That is what I thought... I had a old stiff cable system. Replaced the cable and let me tell you that removing that
was painful. I had to take a hack saw to get it out. Putting the new one in was a little better. It was still stiff but not as bad as it was. One season of use then it was back rock hard steering. So dreading the removal and re installation of a new cable again. I bought the bay star hydraulic system for 500 bucks. I think the hard part of it was cutting out the old cable system again. Installation was a breeze! I think total time to remove old cable system and install the new system took a little under 4 hours. The only thing that I didn't like was the fact they include in the kit plastic tubing for the fluid lines. I did the install a little over a year ago and I haven't seen any leakage. I do recommend if you do this install instead of using the clear fluid they include with the kit. Get a gallon of MIL-H-5606 from your local airport, or order on the internet. So if you do have a leak in the system you can spot easily due to the red color of the hydraulic fluid.