No problem at all mounting the xducer on the TM. I have one there and one on the transom.

So do I and not a prob with interferance

works good JUST remember not to pull the tie down to tight on the cables that go up the shaft. I use black tape. if you use the nylon ties they can pinch the cables and cause problems....

I also use black tape, for the very same reason

If I were you I wouldn't mess with the skimmer transducer, call your dealer and see if the won't trade your skimmer for a puck, just trust me on this 1. Tried the skimmer and now have a puck. The skimmer worked fine but was way, way to fragile