Rupicolous Laelias

[SoCalOrchidMan]

I would like to grow more of the rupiculous Laelias but not quite sure of their preferred growing media. Has anyone tried to grow them mounted with success?
One grower near me has them in a layered situation. In a clay pot he has a third of the bottom of the pot in rock covered with a thin layer of sphagnum then the plant is topped and surrounded by a half inch of builders sand. He gets good results. Said he was taught this method by growers and collectors in Brazil who observed these plants in their native habitat that do not necessarily grow on rocks but in the crevices of rocks where they were surrounded by lots of gravel and organic matter.
Any experiences of success with this class of Laelia would be appreciated.