I have a 2006 60 hp four stroke. It is not a Bigfoot model. I do a lot of trolling and am interested in the Smartcraft system. I have asked a few local dealers in the area and unfortunately I seem to know more than they do. That is a problem because I do not know much. I am interested in the rpm control. How does it work? I am also curious if there would be any problems for my year of engine? I would be installing this myself, how difficult would this be if it is compatible?