I guess the only stupid question is the one not asked...here goes...D6, clean armature, new brushes, but I have to spin the thing now to get it going. All sorts of RPMs at different timing, but I still have to spin the armature most of the time to get the damn thing going. What have I missed or overlooked? Even tried shimming the arm in the can in different places, same result. Any help or constructive suggestions would be appreciated.