I hear ya I have a decent collection of metric tools and one of the few things I actually like spending money on is tools. I am usually a bit slow in figuring out the right combo of tools required to remove elusive fasteners, but I almost always make something work.
This time I am a bit stumpede though. I think I just need to get some of those 1/2 moon wrenches and maybe start grinding away at some tools. Unfortunately I dont have a bench grinder either.
Aschen really needs a bigger garage for more tools. When an elise takes up most of a bay, you know its a small garage

. The 930 is practically a squeez!