It's also unlikely a probe connection problem since it is not a double-
probe and I feel safe to assume the probe gets taped at each assembly
of course. Borrowing a probe from another ship will help isolate any
problems with the probe itself it It winds up being suspect.

The Brunswick socket won't have any internal seals. Just one tube
inside another. Tape is unreliable. A short length of silicon tube
tightly fitted over the joint is better. If the tube can stay in situ
in the trailer then wire it or castrate it with a couple of Cheerios
and leave it well alone.

I may just have tunnelvision but really I think an old vario (with
aged internal seals...) that has pitot and TE seems more suspect of
crosstalk issues than a new Winter quick connect or probe performance
issues...

Seems the first port of call for an elimination exercise. I await some
more real data with fascination.