I'm going to pull off the two old brackets, fill the holes, add a mounting board, and install a Helix Compact SI transducer. The boat came to me with a Helix 7 DI, transducer mounted on the bracket on the second step, furthest from the center but I see that at one time there was a transducer on the first step. Any experienced advice on where to locate the new side image transducer, 1st step or 2nd step? Thanks in advance! (BTW don't bust my balls, I know it's filthy! Just trailered it after being in the slip a week, it'll get a good wash job when it stops raining.)