Gainsey:
I remember seeing a pic of what looked like a bamboo platform on top a a large garden shed with a Whirlwind perched on it... Naanga Gat?
Well could be indeed, if so I should have remembered it from a version of a well known song which went something like:
They wouldn't send me to Tawau, Tawau,
They wouldn't send me to Tawau, Tawau,
Oh, I've been to Nanga Gaat, but I didn't fancy that
And I'd rather be in Tawauwau!
With the wonders of the Internet it is indeed on a tributary of the Rajang, the Baleh. Has Gainsey cracked it, and what about the other site? About the only DZ name that comes readily to mind is Long Jawi that I seem to remember straddled a ridge and was thus very unforgiving of CARP (Calculated Air Release Point) errors.