SNS3:
Thanks a lot. I am new at the "high altitude" flight (above 410), all my previous experience in the Thirties (C-5, sometimes low 30s) and 450 and above seems to be a "silver bullet" to some. "We'll top it, no worries", but I agree that if you are not topping by a lot, DON'T and a whole bunch might not work. Glad to hear the 1,000 ft/10 knots of wind verified, I have heard that before.
Your experience does NOT, I take it, relieve ITCZ and tropical storms from being a concern, then?
GF
Thanks for your great stuff, BTW