Help calculating Speed To Fly for headwind and tailwind

On May 29, 9:22*am, John Cochrane
wrote:
Many people make the mistake of thinking wind affects final glide. It
does not (except for the above meteorological considerations). There
does come a point, gliding in to the wind, that lowering your
MacCready setting actually results in a worse glide. You'll see that
-- you get low, turn down the Mc, and all of a sudden you're even
lower! ouch!


I was involved in an animated discussion about this just last weekend
when a group of us was dining out after a fine day of soaring. I was
assured that at least one popular glide computer does take wind into
account for final glide and that a setting MC=0 would always give the
best range glide solution for the known headwind or tailwind. In
other words the glide computer is finding the MC setting that gives
max range (more than zero for a headwind and less that zero for a tail
wind) and displaying that as the zero MC setting. I maintained that I
never had a glide computer that did that, but admitted it was possible
that someone had implemented it that way.

So designers, or users, of popular glider computers - Does your
instrument give max range at MC=0 regardless of wind or do you have to
adjust MC for the minimum vaue of required altitude?