I have a 77 bayliner with a volvo280 outdrive, It currently has an electric tilt unit only. It doesn't work well in shallow water, because I can't trim it up, to get in and out of the shallow dock areas in Michigan. I've been trying to find a hydraulic trim/tilt unit to install, instead of the electric tilt cylinder. Is there anything out there that will work, if the original install was only that electric tilt cylinder?