I try and make ALL my landings at less than 360 feet per minute. Don't know what it is really because I'm not looking at the VSI when I hit the ground.
I struggle to see that 1 kilogram above maximum landing weight will add several hundred metres to the landing distance. Another part of this problem is that when you have a problem I.e. engine failure, you don't need the extra additive. You just use the above and below weight correction.