as usual, I winged it ....
I came up with this jig possibly after seeing some on You Tube, I really can't remember. It's a parallelogram kinda thing which has adjustments holes for the gross dimension. You then use the parallelogram feature to fine tune it for the width and fore center. Notice the holes visible on the right side toward the front ... there are 3 on each side. It is currently in the center hole.
I also used a standard Porter Cable edge guide and it is screwed to the rear bar while the front bar can be adjusted. Once everything is centered, by using the threaded knob on the PC, you just tighten down the black T knobs and off you go.
Notice there is another block of wood at the end of the PC guide which is just a support to ride on of the correct height/thickness as the workpiece .... a scrap.
The Irwin clamp is used for a stop block. I'm sure a better arrangement can be made, but this worked OK for me....
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 01-13-2016 at 11:36 PM.