If HB ever wants to get serious in the saltwater market, they need to redesign the transducers to be easily adjusted with the boat in the water. Loosening screws that penetrate the hull skin are a no go for boats stored in the water. There needs to be a fixed /sealed mount, then all adjustments up, down, left, right, tilt, rotate, done from something removable with a mask and fins or done from a swim platform. Plastic thru hulls will get your insurance canceled. Bronze or marlon only.