I'm having a wonderful day, and yourself? i also read what is posted and when the UAT was bypassed it ran fine And drew fuel from the main tank. IF the vent was plugged it will collapse the main tank as the pump sucks the fuel out and there is no way for air to come in. if the tank is fiberglass or Kevlar then it'll bust hell out of it when it develops enough vacuum to do so, if you don't believe it, plug your vent, fire the turbine up and watch it.