Hi guys, and thanks for the compliments!
My plants don't grow exactly under the same conditions. Lowlanders grow under one layer of black 50% netting, highlanders under two layers. Yes, that sounded silly to me when I first heard of it, but here, it works. The environment here (Northern Taiwan, ocean-facing hillside, 700 ft. above sea level) is lowland in the summer and intermediate to highland in fall and spring (in the two winter months I cover the whole greenhouse with plastic and install a heater). The most important thing, however, is the night drop, which allows the highlanders to survive the summers, but is not so harsh as to kill the lowlanders in fall and spring.
As a result, burbidgeaes, ramispinas and stenophyllas grow just as fine as amps and bicals, albeit at different seasons. The only neps that absolutely thrive like weeds, no matter what time of year, are my cheapest - the ventratas - and my most expensive, the Cantley's Red. Weird, but I can't complain, I guess...
As to my burbi, I grow it just like everything else, low or high:
in a deep pot with a bottom lining of medium-sized pebbles, then a mix of fine and coarse "orchid bark", fine and coarse clay pebbles, fern tree bark, perlite, small granite and quartz pebbles, and a little (maybe 10%) peat, all topped with a fat layer of dead LFS.
DISCLAIMER: This mix works for me, but might not for others, as it's quite sunny-hot in the greenhouse, but also windy, and the plants get a lot of rain (man-made rain every hour if the heavens don't provide any). All that calls for a light, fast-draining mix with humidity-preserving properties (LFS and perlite), which works fine for all my species and hybrids (the ultra-lowlanders get some more peat and also shredded sphagnum in their mix)