My tilt assist cylinder is gone on my Johnson 48 SPL. They tell me a new one is about 450.00. I'm not sure what a tilt & trim system would cost. The boat shop told me he had a used jack plate he could mount for 350.00 total. I'm fairly new to this motor business and need some advice. I don't think I need a T & T. I just don't want the motor coming up when you put in reverse. It's a hydraulic jack plate. Thanks for the help.