Hi Roger
I would say that whatever works, is ok! When you're plant is growing nice, healthy roots and thriving, you're doing something right.
You say it's a cattleya and, at least here in southern Africa, it is fairly common that catts are growing in rocks and gravel. Unless the stones are too small, they normally create a very quick draining medium with lots of air pockets in. My limited experience is that cattleyas like that. They also like to dry out between waterings. That's something I tend to forget and it has cost my plants a lot of roots over the years.... So rocks in a teak basket sounds like something I ought to try. Over-watering in a setup like that sounds virtually impossible.
Good luck!
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