I haven't yet, but been wanting to. I would use the trolling motor mount 360 transducer though. I met a guy that has his rigged up with a ram mount, to use this winter. I told him to make sure he and I keep in touch, as I'd like to hear how it works for him.
If I can find one cheap enough, I'm going to try it.
In the same boat as you though, not ready to fork over the cash for an experiment yet, even though I think I could probably sell it in the spring if I didn't like it.