So i have the latest revision of the transfer unit modules assembled. this is the fourth edition of this module as I've slowly been able to break down more and more of the original schematics for the WITCH and understand how they are actually translated into modern components and functionality. i started off with this simplified diagram from the Electrical Engineering magazine article on the WITCH:

My initial attempt at the transfer unit was to simply identify the functionality of each of the components and match them with a modern equivalent:

I quickly realized that this diagram from the article was a simplified diagram, and began combing through several pages of schematic. I've slowly identified all the core functionality with this being the resulting schematic (minus the Dekatrons which as done separately):