I learned yesterday afternoon that even relatively slow descents need much more clothing than the rest of my ride. -5C/22F. Next time I'll try to take the gravel trail down, there's a bit more shelter from the wind and it's easier to control my speed. I used some self control and kept it under 50 kph but I was still chilled and my right leg was shivering. I'm also going to dig out some of my snowboarding gloves and face mask for a trial. Other than that, I was dressed perfectly and warm for the rest of the ride home. The home made studded tires worked great on the ice in front of my apartment building and any icy patches on the trip home. Only slid in a bit of the soft slushy snow I found while climbing, but I'm feeling a lot more confident about winter commuting now.