Hempy
Correct (on my meager understanding).
But the adjustment factor for wind effect on lowest drag IAS to get maximum range in e.g. a Warrior is only a few knots up to, at a stretch, a dozen if the head/tail wind is 25 knots.
During the flight the subject of the report, the difference would be a couple of knots, if any.
But the important point is this: We’re talking about vastly different IASs.
HYPOTHETICALLY 80 knots (lowest drag) versus 100 knots (preferred/planned/glossy brochure cruise).
The extra speed above the lowest drag IAS costs FUEL. It usually doesn’t matter much, unless the flight is towards the limits of the aircraft’s range.
Like a trip from Lilydale to Southern Queensland in a Warrior ….