Make a stop block as an attachment to clamp anywhere along the rear fence and serve as a cutting-length guide. It is essentially a 3-foot piece of wood notched along its length while leaving an uncut block on one end. The end of the redwood lumber will butt against the block wherever you clamp it into position to ensure consistent lengths for cuts. Reposition the stop block as necessary, clamp it, and use it and the cradle to make all the straight cuts for the project.
