While browsing the Outcast site I noted some summit pressure release valves that can be used to keep pontoons from expanding and blowing out. I know the human factor should be enough and have gotten into a good practice of deflating some when done before or as I put the pontoon atop my POS Pathfinder's custom pontoon carrying rack (ghetto conduit but heads turn!!!). Anyone use these things? Summit pressure release valve part number 350-000171? They are $6.50 each and my boat has four valves. I'm just wondering if it is a worthwhile $30 investment, what do you think?