Will,
Thanks, I've noticed the Damsels are actually pretty agressive. And of course, noticed that just after I went out and bought 3-4 of them for my home tank and cycling work tank.
The Domino is already the aggressive one of the tank now, although he doesn't mess with the slightly smaller clown. Now, its all about building a smarter fish trap, or getting a super small fly fishing lure.....
FWIW, the clown took about 2 days to become comfortable with the tank before he started hosting.