I looked at them both today, one was more dead than the other. I am guessing at this but potentially to much water. They were both in akadama, pumice and lava and it was free draining but perhaps not free draining enough with water 2 times daily. I also fed everything pretty heavily recently based on my "no time" schedule.
I will say the root pad development was real nice on the layer just before it died. I kept it and will post photos as soon as I can.
Anyhow i think I will try this again if I ever find some nice material.