Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I'm familiar with the website that's selling Jerry Howell's plans (I bought some before), but never noticed until you pointed it out that the Tarot was one of his designs:

http://www.jerry-howell.com/Beamer.html

That explains the mysterious hole in the base, it's for the faux ball governor.  The Tarot has to be a 100% copy, minus a few extras.