I wasn't feeling any
resistance when I first engaged the sharpening stone on the 40
volt Oregon battery powered chainsaw.
Turns out you can install
the stone backwards and
the cover still fits.
Expect to see sparks flying
for the few seconds of sharpening.
That is a design mistake. One of the unwritten rules of mechanical design is that if the orientation of a part is important, it should only fit in one position.
Moving the holes where the screws go through a couple of millimeters would probably have been sufficient. In that case the holes in the stone holder would only line up with the threaded holes in the lever if the stone was assembled correctly.