I have recently purchased a new to me 2017 SX20 with a 90 hp Mercury. The boat does not have a speedometer. My previous pontoon had one in it and it was helpful when trimming. I could use my cell phone GPS but an analog dial would be easier to read and I usually have phone stored. Also my old motor had a water tube that went to the speedometer does the Mercury engine have that capability? Can you buy a new console insert that would accommodate the additional indicator? All this may not be worth it but thought I would ask..Thanks