I have been blessed with the opportunity to have spent the last 2 days on the lake with a pro that has a Humminbird 987C sidefinder unit. All I can say is it will take your breath away. We went past a sign that indicated an underwater cable crossing and you could see the cable run from under the boat right to the sign. UNBELIEVABLE!! And bottom images that leave nothing to open interpretation. I am considering a move from my Lowrance X-19C which is shoot thru to the Humminbird. I want to be sure to position the external sidefinders in a way that is clear of bottom turbulence. Has anyone mounted these on Champion 203 or like hulls? Any suggestions?