Dave: Forgot to Answer:
"Is Cyclonic the only version with the button hole? Have you seen the later set with Interstate on it...in the States? Is the new tool on the website labeld Tristar?"
So far as my own experience and observation go, the later, button-hole tools all say "Cyclonic". I have never seen any button-hole tools that say "TriStar" or "Interstate". The new rug tools for sale on sites like TotalVac say "Cyclonic". I have the new tool, but it's in a painted finish that is not correct for my machine. That's why I'm hoping a classic, polished-finish "Cyclonic" button-hole tool turns up.
So far as I know, the "Interstate" designation is only on friction-fit tools, but that's based on my personal observation, so take that only as one person's opinion, not a proved fact.
Aren't these details fun?