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Old 20th November 2009
  #8
Lives for gear
 
jhbrandt's Avatar
Yes, only one side.

Sometimes these things are counter intuitive. But the research, math, experimentation, & documentation all point to these conclusions. And believe it or not, 2 walls are better than 3 or 4 even.

There are quite a few threads on this subject here, just do a search. Quite a few with diagrams and examples.

Good luck!