Has anyone built the "Slate of Fate" from Paul O's Haunted Illusions? I was wondering if:

A) It's easy to construct?
B) What the overall dimensions are?
C) How many assistants are required?
D) What are the performance restrictions?
ie: Stage only, In-The-Round etc...
E) Is the book worth the money?

I would appreciate any answers anyone could give me.

Thanks