I had to work three more meters, I had then reduced within about 15 minutes (craft N00b with little experience). The disc went easily through the wood, nothing is burnt. What is important is obviously especially that you can do the work yourself the Dremel: The own hands leads only the tool, but pressure does not increase, otherwise get the Dremel "stress" and is noticeably slower.
According to three meters, the disc has of course no longer shone so beautiful, but I can find no significant wear. At least for the occasional use so there is to complain about any deficiencies.