I just repotted mine, just cleaned off the roots, washed them real good and dipped them in fungicide, cut off the dead roots (roots which the outer casing just slides off the inner root), and repotted with a mix of 20% spahgnum, 80% bark chips with some river stones at the bottom of the pot. I used some sphag to keep it a little wetter because I like watering less frequently. I also underpotted it a bit as I will be mounting it next time. Other than that I treated it just like I would any other orchid with psuedobulbs (like my oncidiums and hybrids). I dont know if this is helpful, but I hope so.