The Seamaster takes to snow like a duck to water . Don't worry about the slightly flexy vertical stab, I don't bother with external struts, but my Seamaster has never given any trouble in that area despite countless Lomcevacs.

As for your fingers --- I use winter golf gloves. They are nicely touch sensitive & have grippy palms & finger undersides so that you don't drop the Xmtr. They are also warm enough for a full (10 min) flight at -10C with a 10-15 kph wind, before you have to run & hide.