Thanks heaps for your reply, excactly what i wanted to know. I noticed the second pattern on the Autotecnica hub, and have trial-fitted my Momo wheel, but I need the momo earth ring to keep the horn button in. It's loose in the middle of the wheel, plus there's no real way to earth the horn securly without one. Not sure if they're supposed to come with the wheel or the hub or both - either way, the wheel was secondhand and I only got the wheel and the horn button.
As you have both sort of hub, are there any real differences between the Momo & Autotecnica (part from the extra pattern? Do Momo bosses come with that corrugated sleeve like my Autotecnica one, or are they all smooth?
My boss came with my car and happens to be a pretty good match for the interior(blue). Do they generally come in a few colours other than blackor did I just get lucky?