Charred wood mounts-good or bad for orchids?

[Russell 99]

I was able to get two blocks of wood, the shorter ones are turpentine and are very hard ;the larger one is unknown but is quite fragrant.

I was planning to mount some orchids on them but I'm unsure if the orchid roots will really attach to them. Planing to mount a bulbophyllum, lusia and propax(conchidium) species on to them.
I've used chared wood chips with orchids such as Dendrobiums, cattleyas and oncidiums and the roots attach pretty well, but since I'm dealing with 3 completely different types of orchids I'm not sure how they'll react to the mounts especially the conchidium.

Any ideas would be really helpful, thanks!