I heard about this discussion and figured I'd throw in my 2 cents..
I came up with the basic idea in 1993, right as I was ready to put my Fantastic Floatation on the market. Initially, I used a cardboard box.
I knew it was a good trick, but since I had just put a bunch of time and money into preparing the Fantastic Floatation for market, I decided to put it on the shelf for a while.
In 1997 I was suddenly inspired to work with the idea again (I was broke). I switched the cardboard box for a milk crate and added the second phase of the routine.
The trick is similar to what was published in the magazine, but there are major differences. For one, mine looks more like a crazy flying device made by some mad scientist, which really adds to the effect.
But most importantly, my routine includes the second phase where the entire box floats off the ground with you inside it. This is the best part of the routine, I wouldn't have put it on the market without it. It is now available on my website in manuscript form for download at http://DownloadMagic.com
On another note.. I heard a rumor that I didn't receive proper credit in Genii regarding my involment in the creation of Copperfield's Laser illusion, and that my involvement was limited only to consulting.
Is that just a rumor? To set the record straight quickly, I invented the illusion and performed it on Television years ago.
I sold it as a complete routine to David and did very little consulting on it after that.
When I did the illusion, it was presented fairly close up and was called "Splitting Image". I performed it on live TV for Nippon network in Japan. There is a tape in circulation, sorry I am unable to provide it to anyone.
All the best!