This is a great weigh in system! Does anyone have one yet? Or what are your thoughts on it if you haven't seen it yet? If you have a working livewell in your boat this will work in your boat. Check it out 

Sackcaddy.com

It's kind of a cool idea, but the price is pretty steep! You could make your own for less and have less instillation work as well. In fact looking at it again, it's inspired me to make my own.