I have a cajun jacker jack plate on my boat, 17' xpress with 115 yamaha, I wanted to adjust it, went to loosen the side bolts, they are super tight and i sheared one, first question is do those bolts need to be tight? Can i run it with them loose so i can make adjustments? What are the benefits of a hydraulic jack plate? Is it worth the $1000-$1200 to have one?