OCD with the Letters in the Right Order!
For the ones I've put together (not the specific set you mention) I just relied on looking at the photos provided and maybe looking for more online. Test fit pieces before gluing them to make sure they look right.
I am having trouble figuring out which figure is which, but I will dig more into that later.
I did find a local store that still has players on Sundays (Full Spectrum War Games in Arlington Texas), so I will probably go there for some help.