I have had a 788 down imaging unit for about a year. I used it on my previous boat and damaged the original transducer, which broke completely off and was lost in the lake. I got a smaller aluminum boat and was looking to hook the unit up on it. Have been looking at different transducers and mounting options. Wondering which I should go with, preferably not plastic as they seem not to last with me. Also, would like to use while under outboard power. Any input is greatly appreciated.