I recently bought this saw. The motor was dragging, throwing sparks, and sounding as if it was bound up. Taking it apart I see the back bearing is only mounted into the bakelite motor case. The schematic shows a bearing bushing above, yet says it is obsolete. What gives? This is allowing the armature to be pulled off center so that it is dragging on the coil windings. I cannot believe a new motor housing would hold any better for any period of time, and if I cannot justify buying a complete motor for the price listed above.