DB,

What kind of canoe do you have?

I have a Bell Magic solo and the "shoot thru the hull" method using a foam cutout in my bow works like a charm.

However, I have tried to make the "shoot thru the hull" method on my Wenonah MN II tandem work and I cannot get it to shoot without all kinds of interference. I have placed the transducer puck all over the floor in the bow to no avail. I know there are foam ribs across several areas in my skin coat Kevlar and I was sure to stay away from shooting thru foam core.

From your pic ...it looks like you have a Wenonah canoe ... and it is working for you ?

I am not sure if a MINNESOTA II has some construction material that may be blocking the sonar waves emitted from my Lowrance X-4 depth finder. 

Anyone know about the construction material of a 1992 MN II Kevlar skin coat ?  I thought a 1996 Bell Magic would have similar construction material as a Wenonah  MN II.