The reduction rings are merely a stopgap. Center the sheet passable, but a really good cut can not be achieved by this they are made to be inaccurate. Even worse is that the rings are not stuck in the blade and narrower than the leaves, so they do not contribute to torque transmission. But for this you take the standard clamping screw practically gone the whole surface. Therefore, the sheet slips through easily, no matter how firmly you also anknallt the clamping screw of the saw.
Angetestet, deemed unusable, returns.
6/2013 AL