don't believe all you read!
Especially when it's about search engines.
Search engines can detect the footprint of
any devised linking scheme.
And with 20 domains to cross link you are thinking too small, it probably won't even create a blip on Google's radar.
Google deals with hundreds of millions of websites, billions of pages, untold billions of links.
We run three servers on nine IPs and most of our clients are in the same sector of Artistes and management agencies, and they link back and forth to each others pages all the time with no thought of search engines, which of course is the best way.
--
Chris.
So long, and thanks for all the fish.
http://webmaster-talk.eu/