To clarify, I am not suggesting that you take the vang off and discard it. I am suggesting that if you feel the attachment point on the mast is damaged, and you are worried about breaking something, that you can remove the vang and keep sailing
until you can properly mount it
I did write that the vang doesn't do that much, and I continue to believe that. Perhaps if you are racing the vang is more important than just casual sailing, but even racing I don't think it does that much. On my boat (non racing) I have used the vang maybe 2 or 3 times in the three years I have owned by boat. Maybe it's just me, but I just don't find the vang all that useful. Upwind it doesn't do anything. Downwind it can be useful, but for some reason I just don't sail downwind all that often. On a reach I find my self using the traveler a lot more than the vang.
, the main sheet is used to control sail twist for all points of sail except a run. And on a run a little more twist isn't going to really effect speed anyway.
I'll try to play with my vang some more, but I don't expect to see dramatic changes.