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Thanks Hucks, so I need to start another thread to reply to my post :frowning:

Anyway, this might push me into 15 points so at least then I might be able to find out what “spiral vee” is? 

Cheers sgo

I have too many points - still don’t know what it is and not inclined to ask! :slight_smile:

Seeing its one term I’ve never understood I will persevere and find out , though it does seem like a touchy subject.