I have built an Iridium UL and enjoy it very much.
Interestingly, the one I built is the UL version too.
Good to hear the kite is forgiving. I'm always a bit nervous sending an untested kite to someone. Also reassuring to hear Tom didn't give it a bad rap. From the vids he has posted it looks like we have similar tastes in sport kites.
Next build? Already done.
I'm waiting for the right wind to test my latest variation on a design I've been fiddling with for a year or so. Unfortunately it has been blowing over 15 knots for the past 7 days...sigh!
I have plenty of standards, lights, and ULs so I'm working on a slightly smaller version of one of my standards (about 90%) for those breezier days. And after trying a Superfly recently, I'm placing the T-piece/lower spreaders higher than I normally would.
... and until I've finished testing, I've made it look like a Magnet.