This scupper mount is very easy&cheap to make. It is removable so it can serve you in all your kayaks. The photos explain how to make this nice transducer holder.
The maiden voyage of my new Kraken to test transducer mount and get used to my new kayak went very well. Despite the fact that the pikes are nearly spawning I managed a nice specimen in the photo below
The feeling with the new kayak could not be better, stable and very fast ideal for fishing big lakes on a day like this one with plenty of wind and waves.