glass graphite composites and the like the motor end or motor insert 42 may have three four or more sides 45 or surfaces when used as an insert to support a cavity 68 type motor end 66 the motor end insert 42 may also be fabricated in other form factors such as circular cylindrical as a bowl and the like in order to conform to the shape of a cavity for the intended use as an example fig6 illustrates a generally bowl shaped motor end insert 72 having only one side 76 in a concave shape with reference to the outward facing surface 79 there may be holes 74 similar to the description for holes 43 44 the finger insert 40 may have two sides 46 to position the sides 46 on each drive finger side 70 of the drive finger 64 for the illustrated lever 60 the two sides 46 may be approximately parallel and spaced apart with a shape that approximates the form of the drive finger side 70 to provide support adjacent to the drive finger side 70 including a tip portion 25 for the drive finger 64 portion that engages a movable blade other forms of levers may have blade drive mechanisms with different shapes for which a different shape finger insert may be used for disposition adjacent the drive finger sides there may be a bridge element 48 to position the sides 46 in the fabrication process for example to position a.