Thanks guys - good to know it looks ok. I read so much about these 'nems being difficult to care for and all I did was build a pilar so he can be close to the light, and that's it..... I thought he was doing ok, but I'm a bit paranoid that it is "too good to be true".
Something I have noticed about "difficult to care for" species here in Thailand is that they are not so difficult to care for! I think the fact that they don't spend much time in transit has a lot to do with it ..... guessing they are reef-to-end-user in a matter of days rather than weeks, with far less "handlers" in between.