If your not adding a second thru hull tube for the cable you’ll ditch the siphon system. Use one existing tube for cooling and the other for your cable.
Cable adjustment, I have very slight slack with trim at rest... just so cable isn’t taut.... I also use a zip tie around both so cable doesn’t come off the wheel at certain times when landing....
You can grind the trim ring to get more trim, think I got 17 deg before grinding and after I have 21 deg
Use red locktite on trim and steering nozzle cap screws or they will fall out