I came up with this long-arm stop on a jobsite in order to cut deck balusters but found that it was just as useful in my small garage workshop. Held in place by the saw’s hold-down clamp, the jig provides a reliable stop (for accuracy) and support (the workpiece can’t tip and split at the end of the cut). The auxiliary fence also enables you to install a toggle clamp closer to the saw blade for better stock control.
The stopblock is glued to the end of the auxiliary fence. To adjust the cutting length, slide the jig fence along your saw and reclamp. Adjust the saw’s depth of cut so that the blade doesn’t slice through the fence, and you can use the stop quite awhile before it needs replacement.