Cecco
Just follow the AFM, most manufacturers have a 10 kts limit for a reason.
Saving a minute or so for convenience makes no sense, this saving would be offset by increased tyre, brake wear and maintenance.
There is a valid use of tailwinds for obstacle clearance on departure or arrival say Innsbruck, Narsarsuaq etc subject to brake energy and climb performance limits which I trust you calculate and not just wing it, which I suspect from your post is what you are doing.
Last edited by Above The Clouds; 3rd Oct 2012 at 18:45.