You're obviously into the Tech stuff. Learn something every time. Don't think I would ever get that deep into it but I still like to learn about it.

  My attempt at a DIY transducer holder was a little different than you foam one. I got the idea from someone here and then did my own thing.

  Used silicone to glue plastic container with screw on top to canoe. Then cut a round piece of foam to fit tub. Cut slit in foam and screw top lid. Put transducer into tub, used foam to hold it upright and then added water and put the lid on. Solved the problems you mentioned with your foam holder.

Not as elegant as your current set-up but good enough for a tech challenged guy like me.  ;) ;D

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