Maggie, sorry I didn't get to this sooner.....
I've never grown these myself, but several grower friends of mine do, and they all grow them the same way. If you pot them up, the large, fast-draining media is correct. Make sure you *don't* use any kind of small-sized medium that will compact around the roots. Use large chunks of bark, CHC, or volcanic rock that will be completely free-draining and leave plenty of good-sized air spaces--similar to the way you might pot up a young vanda. Otherwise, just mount them on something they can wrap their roots around.
They have a winter dormant period that needs to be respected, when they shed all of their leaves. Keep them cool and only water very lightly. When they're in active growth on the other hand, they should get lots of water but their roots have got to dry off between waterings.
Give them bright, bright light too; at our latitude, definitely sun in the morning, and very good air movement--that's really important.
That's about all I know--the large media is crucial otherwise the roots will rot really quickly, so no sphag or anything.