Well I put a mix together. Seems to drain fast and hold moisture. Thinking of using it on some orchids too.
I used what I could easily find.
1 part each
Better grow orchid mix
Medium tree fern fiber
Then on the very bottom used a layer of cheap drainage rock. I like the weight it gives to the pots. Especially for the top heavy plants. I will post pics after I get back from the orchid nursery.