I didn't rig it permanently, all I did was test it by dropping the transducer into a ziplock bag. I did convert the power to AA's, which was easy, I still have to cut and splice the transducer cable. I just used a suction cup from an old finder to mount  the transducer to the side of the boat. I have done a lot of reading on this on the various forums so what I will do is use silicone to mount a foam (I'll use minicell I think) cutout to the bottom of the canoe. Then I just pour in some water, pop in the transducer and we are off to the races. I figure the silicone will allow me to remove the foam a lot easier than epoxy, if it ever needs removing.

Moonman.