My Depth Sounder "Raymarine" transducer has packed up,I am having trouble getting a lift out to fit a thru'hull type which I can take out for cleaning or replacment.I was thinking that perhaps I could fit an in hull version of the transducer,I have a spare NASA type which I could glue to the inside hull.Has anybody tried this and where is the best place given thickness of the GPR, Keel etc.It also occured to me that maybe a Fish Finder might be a good idea,any suggestions.Regards,Gerry