I recently picked up a Ranger RT188 and will be looking into new electronics and TM, likely a linked Hummingbird/Ultrex combination. I'm handy but don't have a lot of experience with electronics. How many people are doing these sorts of installs themselves? How much do installs run if you were to have it done? Does everyone have their dealer do it or are do local marinas do electronics installs? Thanks in advance.