Any question answered...

Generally, fuck it was windy this morning

Up to 21mph by this evening, going home should be a breeze.

Main, but not sole. At 20kt IAS, aerodynamic drag accounts for about 80% of the power. If you can do 12mph into a 14mph wind, you need more power to do 14mph into a 12mph wind, because you have added 2mph extra rolling resistance and bearing friction, even though the aero drag is the same.

I was hoping the non-stopping/starting part would help with that but then again I am also ignoring hills.
New bike with less friction/more aero position I think...