OK, I have had a little set back. For the next Demo I was setting up these cards to work with the DBC. This time I was taking the electronics off the bench and sticking them in the tank. For whatever reason the motor line trigger with the motors installed is not triggering the acceleration sound like it did on the bench. I am a little stumped as to why. Voltmeter indicates the potential is there, but for some reason it is not triggering the card like it did in the bench. I removed the motor load, and it works. Spent all last night scratching my head on this one. Maybe some diodes to work as a filter or something is required, and I will try this tonight. 14 more days and I am retired and can spend all day on these kind of things

If anyone has an idea, please share, as this is a DIY project, and the more input from others the quicker this obstacle can be overcome.

So there is a hurdle to overcome but I am not giving up..