SimonTheBeetle: I can't imagine my WGT life without him and all his cool stuff.
He's DA MAN! What can I say... :-)
Cheers Simon. Unfortunately Tampermonkey isn't available for IE. Maybe there is a script manager out there somewhere for it.
andwhy67: Nope, cant enter anything in no.4
Andy, I thought I had Gary's calculator on my system somewhere, but I can't find it right now, might have to download it again. Then I might be able to sort you out.
EDIT : By no.4 do you mean cell B5 the wind direction value? That cell should have a drop down arrow show when you click it, then you can select a value from 1 to 12 from the drop down list.
Typing a value directly into that cell that is outside the allowed range of 1-12, will throw up a data entry error pop-up.