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Check this out James,Something that can ride in the boat at >80 mph and tell me the vibration. A piezo film vibra tab vibration sensor. You have to clamp it with a zener diode to prevent the 70 volt output capable analog device from overloading the 5 volt input on the MCU. Also the inverter that I'm running Is the currently best the market has to offer. APD. It is a military grade specified piece with a 7 layer pcb. It has the ability to further quiet the motors sonic and ultrasonic vibrations as well. Teamed with a beta flight FC It has low and notch pass filtering capability . It can attenute or bypass triplen commutation frequencies increasing the power factor and efficiency. It can also avoid frequencies that resonate with the frame of the craft that it is in. , It listens through a GPS acceleraometer and watches the electrical revolutions through its telemetry tach. In addition to the dedicated tach output, through the servo plug it can use a digital protocal "DSHOT", this technology is driven by the drone industry with support from companies like Martin Lockheed. The programming enviroment is open source so as long as you can put the hardware together mechanically (servos,gearboxes....) someone else thats proficient in programming and coding can program the things like self leveling autonomous cannards (anti blowover system) for you . It is a user friendly world for people that may or may not be computer program savy. With servral PIDs onoard you have limitless options. The hv pro drive pictured with the Nue outrunner is capable of 40 kW and it is the smallest and lightest most capable drive on the market. The Aussie made inverter alone cost a RTR scale boat. The motor pictured stock which it isn't is capable of 6 grams of thrust per watt with a carbon fiber Marcel sawblade leadiing edge prop 12 inches in diameter with 24 inches of pitch. What is typical in a thrust to watts ratio is about half that. The fight card can report back real time speed and many more operation parameters user defined to the radio, a FPV HUD or even a smartphone and may more operation parameters user defined. The flight card can also be configured via smartphone. APD sent me the prototype pro high voltage drive for evaluation 2 years ago at Mercedes. It has taken over the F5D competition flying world and the heart of Current world Champion. I'd be the first in the world to introduce this motor drive that can be used for EV traction applications with torque control into rc boat water.https://oscarliang.com/betaflight-filtering/We will talk more about this privately if you'd like. I'm getting a bit too wordy here. Id rather "them" in the IMPBA and NAMBA find out another wayRegardsHubert