Hi Paul,
I grow my vandas in a more or less outdoor setting in baskets with no potting medium. Here is a link to a post I made about my growing area:
http://www.orchidboard.com/community...hids-live.html
I will take a few pics later in the week of the Vanda coerulescens, so you can see that one. It is still a relatively small plant, but grows well and has bloomed the last two years in spring. If you have specific culture questions about vandas, feel free to ask.
Regards, David