No a Dragonfly but I do shoot through the hull with a HB 597ciHD DI. I get great results in both DI and 2D modes (showing good bottom detail in up the 145' of water - deepest I have been).
The Dragonfly is similar to the DI mode of the HB so I am confident you would get good results. My setup is a well of duct seal that I splash water in and then place the transducer in the well. This is nice for moving between kayaks.
Fish tremble when they hear my name
A ship in harbor is safe -- but that is not what ships are built for.
--John A. Shedd, Salt from My Attic, 1928