I would like to point out that in the end I had this watch assembled with the Zodiac movement. The time could be set properly, the GMT hand tracked properly, the sweep hand was ticking right along, and the date clicked over nicely. The only problem was THE HANDS DIDN'T MOVE - hands stayed right were you set them!!! I tore it apart one last time, could find nothing wrong so installed a bit stiffer dial spring-washer (just to make sure), put everything back together, and no change. At this point I think I made threats regarding the continued existence of the movement as a semi-cohesive assortment of components so WW finally "saw the light" and opted for a good Swiss 2836 with GMT complication. After that decision was made the watch was finished in the next day or so...
If somebody is curious as to how to use the Zodiac I'd outline the process but I swear I'll never let another in the door! PITA
But, glad it's finished and back where it belongs and hopefully WW will wear it proudly for many years!
Oh, they DO make a lovely pair...