plurality of stationary knives 62 frame 60 can be thought of as integrally including or separately attached to a pair of end plates 64 at either end of stationary knife bank 46 end plates 64 extend in a generally downward direction when straw chopper 40 is in an operating orientation as shown in fig1 and 3 5 each end plate 64 includes a slot 65 allowing adjustable movement of stationary knife bank 46 as will be described hereinafter a positioning handle 66 is pivotally mounted to housing 42 using a pivot rod 68 pivot rod 68 extends through a pair of openings on either side of housing 42 and is rigidly attached to positioning handle 66 such as by welding positioning handle 66 has one end forming a positioning grip handle for an operator and an opposite end rigidly attached to a first linkage linkage 70 of a two bar linkage including a second linkage 76 which in turn is coupled with tension rod 72 another two bar linkage including an additional first linkage 70 and second linkage 76 interconnects pivot rod 68 and tension rod 72 on the side opposite positioning handle 66 as shown in fig4 this second two bar linkage assures that frame 60 moves parallel to rotor 44 upon actuation of positioning handle 66 positioning handle 66 can also be configured with a generally l shape with.