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Old 29-06-2016, 02:34 PM
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graham.hobart (Graham stevens)
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graham.hobart is offline
 
Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,241
vela

Cheers Rex- I had a go before with PI but I realised I was subtracting the bg not dividing by it- will have another go prob this weekend
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