'Mach' that is definitely not good advice there you saying keep the needle on the nose & you will get there every time then saying during a test you need to lay off drift etc. What's a test got to do with it? I only hope anyone reading that doesn't take that on-board. Doing as you suggest is bloody dangerous, such poor airmanship thinking can take you lower than yr original track LSALT calcs & send you into high terrain.
In yr own words "probably the worst advice"
Wmk2