I recently bought a Hobie Inflatable 12 kayak and want to use a fish finder. I have a Hummingbird that I used on float tubes in the past. The holder for it was on a strap that went around the tube on one side of the boat. This method does not work for the Hobie. Does anyone else use a fisher finder with a Hobie inflatable kayak? If so how is it attached? If this doesn't work has anyone tried the fish finders that float and are "castable" that can connect via bluetooth to a smartphone? Any reviews for this alternative would also be appreciated. TIA.