Just realized my blade is not at 90 degrees when all the way down at stop. How do I adjust this, its off by at least 1 degree, you would think for the money this cost it would be set from the factory. From a earlier post the grinding noise still persists, I used several at 2 different Festool stores and did not hear this noise all the way through the cut but still get told this is normal. Not buying it. Thanks