I've got nothing but good things to say about Jonny Ray mounts. I'm not sure how the smaller mount would handle the big Lowrance unit like you've got. I have gone with in-dash mounting on my new boat, but had a Lowrance LMS160 mounting on the console on my old boat. It was great on the rough water. It never moved while I was driving or broke off. My friend had the same boat and same GPS unit mounted on a RAM mount. The RAM moved all over the place. Not a good thing when you are trying to drive in the rough stuff.