Once I wanted to return to the beginning of this track, because otherwise I would wahrlos cut into the rubber on the track, as was the case in other Rezenssionen, I have dealt long with the customer service of Einhell ... referenced Only the technicians forward to a few lines in the manual, which you should read carefully TENS :) The rubber coating on the edge of the rails is in fact planned to cut them so that you get a cut line, which is adapted to the current saw! So, do not be afraid to cut the rubber! Otherwise, I have to say that the rails quiet steel or significantly higher grade material could be, but if you use them correctly, you keep for a lifetime;)