That is quite a nice plant.
@SCDPs, I've tried them both in LFS/ cypress mulch and peat:sand and they seem to be comparable to each other. I also always use the tray method, since I'm not at my house 90% of the year and they do fine as well. So mainly it's the temperature that's the main issue (or UV intensity, which I personally haven't had an issue with).
@Kulamauiman, what are your average day/night temps where your Regia was growing?