I'm looking to upgrade my electronics; was thinking about a Garmin 73 SV at console and 93SV at bow. However, I'm being told that the 73 is too small for the console, even though it is the biggest that will fit on 2018 Ranger RT178 and that the 93 on comes in SV. I prefer the bow unit to share waypoints with the console unit, so that I can troll to points utilizing bow unit.