Okay, guess this won't be a centerline mount. I'm going to mount it midkayak from the ends but all the way to either the starboard or port side. The X-factor flattens out there and it points relatively straight down. So it'll be off by about 15 inches, big deal

Thanks all for the suggestion.
Here are some pre-install pictures
Location of the Head Unit and GPS
Location of the transducer inside the Kayak
Notice the kayatank restricting access to the center of the kayak.