"Slowly Expanding"?!? Looks like you're diving right in! I'm a fellow fan of Postwar and congratulate you on some awesome finds! I'm a bit jealous at the moment as all my stuff is in storage as yours once was; looking to be getting a new place next summer with room for a layout. Glad you're teaching yourself how to work on the guts of the old locos, I did the same thing and that's why I've stuck with the traditional stuff (though I do appreciate the new stuff).
Keep searching!