I have a Lund 18 ProV tiller with a 90 hp 4 stroke Yamaha. I am getting ready to install HDSI xducer said on my tiller. I see lots of people talking about high speed kick up with the HDSI. High speed is not a problem for me, max is 36-38 mph for me. Do I need a spring back? Also on mounting, is there a specific problem mounting these on the port side about 17 " outboard! That is where I have always mounted my Lowrance transducers in the past with zero problems. Using a tiller I fish off the port side corner a lot so it makes sense to have it on this side. Also I have not had problems with bubbles and Lowrance transducers on my aluminum ProV, are Humminbird HDSI xducers that much more sensitive? Thanks