Gents,
Agreed with the calculations but most of our a/c need the Vapp bumping up by 2 kts or so to give us the 5kts differential. We suspect the a/c are heavier (when using assumed pax weights) than the FMGS thinks it is, so after all the above, F3 works well! And flying the a/c at Vls is a sure way to ensure a heavy touchdown!