Whilst I hope you enjoy your dinner, JT, you might wish to read MFS's contribution in your link at post #6 and I-2021 at post#9 in
http://www.pprune.org/tech-log/27870...e-20000-a.html where 300kts /0.65M would seem to be an
absolute limit, and to lay the 'you're going to be a test pilot/die in flames' rubbish to rest, Checkboard at post #37 here.
BtS - as I said before, there is no answer the way Boeing have worded it. Hope you have some food for thought from the more 'thinking' contributors here. If some day you are in charge and you
need to do it for whatever reason, it is your decision. (and ignore reference to TAS, by the way.'Tis IAS wot breaks things and Mach which causes control issues basically.)
As proven,
Once again proof there are stupid answers.