re:  The Westy does not seem as stable in the wind ... Maybe they need
more pressure.

It would seem logical to me to LOWER pressure to achieve greater
stability.  Seems like overpressure would cause just the center of the
tread to contact, and lowering it would get the whole tread width
involved.  We haven't had any snow here in two years and I
consequently haven't mounted my Hakkapellittas in that time so my
memory could be suspect, but I believe lowering pressure worked for my
similar problem.  My old '81 doesn't have power steering, but it felt
like it did with higher air pressures.