Thanks, it has been a trick.
I would have bet money that the top floor would have been the hardest to heat, but it actually is the main floor that causes the most challenges. The chimney is central to the layout and is closest to the walls on the top floor. It was a trip feeling the walls warm for the first time. But it heats the bedrooms nicely.

I did cut a hole in the floor and cover it with a grate on New Years Day to try to get the hot air rising to the main floor. It helps, but not totally the solution.
If you have any tips, I'm all ears!