'Maggy' I doubt this thread will last long as it is about the J word which is associated with the Q word both a protected species in here at times
I hope it doesn't get slammed shut though as these discussions can be beneficial to some.
I agree with yr analogy about reducing the Mach, I use the 'Superman' philosophy (up up & away!) as I tend to pull off a couple of points of Mach to achieve just that (better margins) & to use the current energy to zoom up & get there faster, I mean after all if it's due turb then why hang around at Crz Clb?
Wmk2