In article ,
Steve Firth wrote:
An engineer I used to know insisted that it was best to place the
brackets at 1/3 and 2/3.

Not much of an engineer. The spaces are then 'equal' 3rds, with two of
them unsupported at one end...

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*'Progress' and 'Change' are not synonyms.

Dave Plowman London SW 12
RIP Acorn