Hi Diki
Here is a short section from OAA manual.
http://www.4shared.com/file/38438397/b8ff4b6b/Chords.html

Is this what you mean by using inversions for accuracy?
The text is converted from German using an online translator
Manual relates to version R17; however the latest version is R28 so there may be some changes to the details

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).