Blanket Temperatures

In October, Practical Horseman had an incredibly useful (and missed by me until January) blanket guide.
For a horse like Willig who is in the barn at night, turned out during the day, and has a partial clip:
60 F - Turnout sheet if rainy or windy
50 F - Turnout sheet
40 F - Lightweight turnout
30 F - Midweight turnout
20 F - Midweight turnout
10 F and below - Heavyweight turnout & hood

And here's the blanket insulation and how it translates:
0 grams - Sheet
100 grams - Lightweight
200 grams - Midweight
300 grams - Heavyweight

I suspect I have been WAY overblanketing him.
Due to his sensitive skin, I also try to use high neck or hood as much as I can for rain.