I performed this in my renaissance festival act for 16 years. I still have the one I built from the original Harbin plans. I made several improvements on the original. If you contact John Gaughan or Bill Smith, please ask them to contact me, and I will supply them with the information at no charge.
Not that I think I know more about building illusions than they do, but I found a few flaws in the original Harbin plans and worked the kinks out over time.
Once you have it, I'll be happy to share information on how I presented it.
Actually, Blaney's other suspension, which he originally called Suspension 2001, is a very good illusion. I think he calls it Suspension 2003 now.