The strain gauge installation I figured out was pretty easy. However, I didn't have to worry about the display device, as the buoy already had a to d stuff, a little computer, etc. I didn't realize this had to go on the Dynon, was thinking of driving some LED's or a little volt meter. I'd put the amplifier right on top of or next to the strain gauge, so any long wires would be carrying a reasonable voltage. Could possibly put a capacitor in the output to slow down the response a few seconds to keep sloshing from setting it off all the time. I did point out that if your time is worth much, the commercially available, pre-made unit is better. The parts for the gadget I have in mind would be very inexpensive. I don't know how much they cost from the usual sources, but you can get a full bridge strain gauge for $4 on eBay. My guess is that the whole thing might be around $20. You might not even have to remove the tank from the airplane. I'm not saying that a strain gauge is necessarily the best way, but I'm pretty sure it would be a viable way to do this.