Nice web page Davester & very generous to share your tips like that.
Can I just point out one small thing about your spreadsheet. Where you have shown us your formula for the putting calculation, you don't actually need to use the SUM function as that is used for addition only. All you need to put in the cell for the calculation is '=A1/1.38', you don't even need the brackets really as there are no other calculations in the cell. Hope you don't mind me pointing that out.
Keep up the good work.