Hey folks!
Tailwind up to 10 kt. is within certification parameters for most airliners. And a 1% weight increment requires an increase in airspeeds by the square root of 1.01, not quite one half of one percent -- that would be a bit more than one whole knot.
All of which counts for patoouie when your wing burns off.
Anyway, actions speak louder than words. The fuel tanks and tires have been seriously upgraded since unless you send out sweepers before every Concorde movement, someday there's gonna be debris that you're gonna run over at something like Vr.