The dots are sounding more like what I will use. The valve I have is well built from machined aluminum and kinda pricey as well but the dot is looking better to me. I'm not worried so much about fuel leaking because I can see that if it happens. What I worry most about is the valve sucking air and causing the engine to not be trust worthy. I assume where you push the valve in to fuel it there must be a ball check valve of some sorts. If the spring gets weak or a micro piece of trash gets in the valve then trouble could arise. Looks like to me if I use a dot and the dot is secured in the line and all the line connections are clamped good then I would have a secure positive sealed fuel system.? Tell me if this makes any sense as I'm in a learning curve on this. I need this plane to be as well prepared as possible because I don't handle dead sticks well.