This is a little fixture I built back aways. I'm working on some bench leg parts and need multiples and the stop block makes this easy. It's just a piece of MDF, shellacked and waxed, with a T-slot cut to accept my stop block.
When not in use it lives in the lumber rack. It comes out to play about once a month but, when you want it, it sure is handy. Along with the ZCI in the throat position the sub-fence is ZCI as well. This gives me nice clean, repeatable cuts.
Note - The 2x4 is for an example, not part of the fence/stop block dealie.