Mine is getting old, doesn't want to stay up anymore.
No seriuosly, I think mine is just spring loaded, not the gas or screw type.
But, that sounds like a pretty expensive replacement vang. He might want to concider going topping lift, no? Would that not help in this situation?
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White