Wow what a wonderful orchid. I am sure you will be able to coax it to do multiple branchings the next season. Also a very interesting story, I can understand how blessed we are to get orchids so cheap than the older generations. On other notes are any of its parents heat tolerant. I have recently got interested in the oncidium intergenerics (because they are so freely available here in Europe) and do not know much about their adaptibility to heat.