NSF said
Once I realised what was going on, I lowered the tower wind by a few knots and the heavy landings stopped.
What do your company's training department think of your unilateral action of lowering the tower wind by a few knots to suit your landing technique NSF as this is NOT an SOP ! You can't go making you're own rules up just because you've made some pretty spreadsheets of your own. Maybe we should all change our DA by a few feet or V speeds because we just feel like it
Read Blue bulletin no.47/2 "Ground Speed Mini Function" It is very clear, very specific and gives adequate examples. Flyerstar is correct in that all you are doing is misleading people with "your" spreadsheet when they should be reading the official bulletin promulgated by Airbus. If you don't like it then the correct prodedure is to go through your fleet technical captain and fleet training Captain and not to make it up by inserting the wind of your choice. In the meantime stick to sop, because if it all goes wrong and you haven't then you will be hung out to dry for non-compliance, and all the evidence will be on the DFDR.