These pics are dark, but you can see the laptop placement is off one of the top "X" bars. http://www.boydsongs.com/contact.htm
The important thing is to use a sturdy, double braced X-Stand, and make sure the weight is even. I used some parts from Ultimate Support stands and Quick Loc stands to custom make a perfect solution.
I also use heavy duty rubber bands to hold the laptop in place, in case some BoZo gets clumzy and too close.
I may have better pics for an email, if needed, but I don;t know how to post pictures on the web. i have a guy that manages my site, so I can concentrate on (avoiding) other work.