If I recall, Stig is now retired like me. I too, rode in the cold weather. Used to ride Ten miles to work at 5 in the morning. However, another mile would have froze me solid.
Another idea on the tinted windscreen. After my recent eye surgery, the glare from the Sun is still bothersome. I modified a 5 snap face shield I had and added snaps on the visor already on my helmet. I bought a can of "SMOKE" Plasti Dip at Menards. Plasti Dip comes in many colors and if you don't like it, it just peels off. My Son Dipped his Velouster Wheels Flat Black. After a year he changed his mind and just peeled it away to the original finish. By the way, it was a visor extension I made.