Foam puck transducer question- SINK

I am wanting to use the foam puck installation method for my transducer.  I have the foam cut out so it fits snug.  I just am trying to figure out where to intall it on the yak. I have a WS Pungo 120.  i would like to put in up front to make for an easy clean install.  I looked in the book and it says that the transducer needs to be level, and also to mount it where the material to shoot thru is the thinnest.  because of the V hull i can shape the foam to fit to get a good level mounting, but am not sure if i am going to have problems with sensitivity, because the material seems like it is thicker along in this location.  Does anyone have any experience with this? Anything you see that i am missing? alternatives, better suggestions?
Thanks

I'm not sure about the v hull, but you may want to put the battery in a drybag

Is there any spot where the hull is simply curved and not "V"ed, like perhaps behind the seat?

You should not have an air gap between the hull and the transducer. Or, I may just be looking at it it wrong.  I have a SINK and I put mine behind the seat due to not having as pronounced of a V.   I also have made an L shaped bracket that I stick under the bungies on the rear deck.  I mount the transducer to the end of the L that is in the water.  I can then remove it and use it in my canoe.

I installed the transducer in my Pungo 140 between my feet, where you have the battery and it reads just fine.  I set it in water in the foam puck so it sits level and no air bubbles interfere with the readings.  I'm changing to a SOT and the hull looks thicker than the WS Pungo, so I'm hoping it works just as well in the new kayak.

I have put one into the V area without any issues.  The key hear I believe is you will need to cut in a foam puck that will match the V hull.   Looks like in your case it will end up being a bit tall but as long as you add enough water and have no air trapped under the transducer as Craig has mentioned you should be fine.   

Agree with bluewrx02 on the dry bag for battery. 

Just put the foam puck on the side wall, so you have a flush connection and no gap.
Definitely put the battery in a dry bag/plastic box...
Good luck!

I managed to cut the foam to match the "V" of the hull and then siliconed it down to the hull allowing to dry overnight with a large rock on it. then tested to check it was watertight, it was.  i then caliibrated out on the lake.  it actuallly seemed to work fine without changing the settings, but i went through the process as instructed.  The only thing i think i may have noticed was that when i just had the transducer just in the water i was in 40 feet of water, but with the ducer in the foam, it seemed i was in 30 feet of water. maybe i drifted a little, the transducer is just far enough forward that i am a little uncomfortable putting it in and out in the water.  besides a possible depth issue, everything seemed to work just great, i could read the bottom and found thefish- what a great tool- don't think i want togo without again. im looking forward to learning a little more about the gps functions