Just a little food for thought BlackJack. I have a Lowrance Prostaffer buddy and his opinion is that dash mounting any electronics will cause premature failure due to increased shock and vibration. Im no expert on the subject but I trust his judgement when it comes to my very expensive electronics. Per his advice, I Ram mounted my helm unit as well as my bow unit and made a cover to fit the hole on the dash from the previous piece, using heavy velcro to hold the cover in place. While this may not be the most elegant solution, I think it looks fine, gives me easy access to electrical wiring behind the console and allows me to take my HDS off the boat when traveling. Opinions will vary Im sure, but you can take it for what its worth.