Nice wheel but I plan on running a piece of grey PVC through that hole then 90 degree turn down to the waterline and mount my transducer at the bottom running my line in the PVC.I am also thinking of adding a screwin hatch plate to access things between the hulls but doing that I will have to cut a round hole either 4" or 6" depending on the one I decide.Right now a lot of places are discounting depth finders as new models are coming out.