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Old 17-12-2007
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RogerM RogerM is offline
*SuPeRsTaR mEmBeR*
 
Join Date: Oct 2007
Location: The middle of off-road nowhere ----- Cheltenham
Posts: 4,258
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Graham .... your right it's not easy .... the maths is quite a PITA to be honest but as soon as I get time I will try to do it for these nice people
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