I know this is an old thread, but I'd like to chime in. I just thought I'd give you some advice in case you wanted to try one again.
I haven't actually grown Chaubardias yet, but I am growing Huntleyas, so I can offer advice on them.
Huntleya is a complicated genus culturally. Some species (like H. burtii and H. wallisii), are very adaptible in cultivation, and can handle a wide temperature range. Others, like H. fasciata, are very particular about their growing conditions. I've found that these plants are extremely sensitive to fluctuations in growing conditions. The more finicky members of this genus are prone to "Sudden Death Syndrome" if conditions fluctuate constantly or if they aren't right.
In general, you want to grow these guys intermediate to warm, with good air circulation. The key to keeping a Huntleya happy is making sure the growing conditions are
even at all times, especially in regard to water. If you keep them too soggy, they'll rot, and if you keep them too dry, they'll shed their leaves. They need phal light levels, but I've heard they can take moderate light like Zygos (I will not back this assertion because I grow them in deep shade).
Another thing to take note of is their proclivity to several foliar diseases. These things are disease magnets, especially if they're stressed out. Be very vigilant about diseases; when you spot the first signs of an infection, treat it as quickly as you can.
I hope that helps.