Just set them up one time. I bought a matched set of rail and stile bits from MLCS. I noticed in the magazine they had "set-up" blocks. I figured I could make my own. So first time I used my bits, when I got them aligned perfect, I took 2 square scrap pieces of MDF. I ran one through to make the stile cut, then used the other one to make the cope or rail cut. The MDF holds up well, I stored them right next to the bits, and I know it is a perfect 3/4 inch. Each time I used my bits I just use my own set-up blocks, it is not always perfect right off, but it saves me a lot of time.