Marti Michel has two rulers that work well for pre-cutting your strips. You use whichever ruler based on the width of the strips you want to use. She also has a Craftsy class that goes into good detail on pre cutting all your strips for efficiency -speed of cutting all strips and also chain piecing the blocks. The class also shows a number of different settings and how to get a variety of effects using different cutting widths within blocks- like those “curved” settings that are popular now.
Rob