You are right, Mark, most gauges are standard FSX xml and one can open and read them easily. But this one seems to be of another kind.
However, I'm ok with the operation now and since this "fix" (it's no such thing, but a workaround only) is public now, CS can look into that gauge for the 2.5 version of the 727.

Dropping a ticket today, so the need for it is in the system.[edit] Done[/edit]

Is anyone else missing the marker sounds on the 727? I wonder if this has something to do with this fix now.
They work fine on the 707, but my 727 stays silent on the Markers.
I've tried the toggling the VC switches and the FSX internal setting with Ctrl+3, only lights, no sounds.