I unfortunatly bought a feather star about four or five years ago, against my better judgement, when I saw one at LFS. I had never seen ANYTHING like it, and had to have it.
I posted on here eventually as my beautiful feather star started fading. Ron Shimek was SHOCKED I had kept my crinoid for a little over 2 MONTHS! Maybe things have changed since then, and your tank is a lot bigger than my 55g that was over-dosed with filter-feeder food, but I kind of doubt it. Hopefully someone will prove me wrong with more up-to-date-info. It was something else to watch that thing "walk" around the tank, and then hang out to feed!