Seat the back of the blade into the groove of the guide roller. Tighten the screw firmly. Adjusting the Footplate For bevel cuts (up to 45 degrees):

Check the carbon brushes. On older PST models, the brushes eventually wear down to the wire. If the motor sparks excessively or smells like ozone, it's time to replace the brushes. Maintenance Tips for Longevity

Use a flat-head screwdriver to loosen the screw on the blade holder.