I love that book!
I understand how you have stalled on Sobieski. Sometimes it gets to the point where you are sick of the sight of a scenario and its best to have a rest from it and return with refreshed enthusiasm and energy!
The initial planning stages of a scenario are often the most enjoyable. I must have planned out (fairly loosely) dozens of scenarios over the years.Just a pity I will never have time to make them all. It will be good to try WWIII without the nukes. Good luck with this new project!