I am looking at replaceing a broken wind system by NKE. I am considering the Raymarine system, st60 series with short arm transducer. I see a long arm transducer available, but do not know advantage/disadvantage of long vs short.Also, I have seen a wireless system called tacktick. Has anyone had experience with the tacktick? Sure looks tempting considering having to run the cables down the mast for the raymarine.