I can see both sides of the argument for and against gassing up with locking bars. To me locking flippers in the upright position is safer, but that was ruled out after Mike's accident. But then I don't like the idea of having the flipper down with a locking bar under pressure either. Honestly I prefer John's method of gassing up slowly from the side of the robot and just let the flipper lift if the valve is open. With a screw valve that is easy enough to do.