I use a new metric tool each time. The tool fits about as good as one can hope for. That is why this brothers me so much. Those bolts just don't seem hard enough.
I like the idea of tapping it with punch. Anything that would get it going would be a big help.
From what I have seen of air impact drivers leaves me to think that that is not the answer.
If you ask me, I'd say that two wheels is all you need.