I think that you are wrong, Geomaticus...
![Grin :D](http://forum.imperiaonline.org/int/Smileys/classic/grin.gif)
I have a yellow tool and has 45 durability, i craft over 20 armors and over 60 raw materials, and it is not drop a point...
Rare and legendary tools are lose durability only when they craft rare, legendary and epic items... you do not have to remove it each time you craft something that it has no chance to be rare+...