Thank you you've given me a something to think about! I have had a look and there do seem to be some good deal of mini Pleurothallidinae flowers to consider.
Despite the size factor after looking at a picture of a Neofinetia falcata I can see the potential and will definitely consider this a contender.

(Though the final display may end up being bigger over all. It's a scale thing

)
You're right in imagining that it will be stone, most likely soft tufa rock if we can get hold of some. Another consideration was a handmade ceramic piece, but this is less likely.
The worrying thing is the more I think about this, the more I want to create more than one display. Guess I'll just have to reign my enthusiasm in before I bite of more than I can chew.
Advice and suggestions always welcome
