I've just had a look and mine is actually '0', so the shim is flat, not angled. I guess it doesn't matter then - or I could just use a normal flat top cap in place of the angled one.
Fair play.
I'd suggest you use a flat one, for the same reason they provide an offset one if you used the angled shims. The thread in your star nut/bung (and probably steerer) will thank you.
I've just had a look and mine is actually '0', so the shim is flat, not angled. I guess it doesn't matter then - or I could just use a normal flat top cap in place of the angled one.