The Rick Welch method of tuning the bow to hit where you look assumes that you are capable of shooting groups like TomatoLane does SOMEWHERE on the target. If you have progressed to that point, then you are probably aware that your shots either go where you want them to go, or else you have to hold off the spot you want to hit to make them go where you want them to go.
First, be sure that your eye is over the arrow. Be sure your form is good and you're not torquing the string or the bow. Do these things first and get used to shooting correctly before you start making other adjustments.
If everything else is fine, but you're still hitting left/right/high/low, then you can move the point of impact 4 - 6" at 20 yards by changing the arrow rest or strike plate material, or adjusting the spine of your arrows or your nock point. A stiff arrow rest or strike plate, like plain leather, will cause the point of impact to move up or left, for a RH shooter. A soft arrow rest or strike plate, like a Martin rug rest, will move the POI down or right. A medium one, like Velcro, will hit in between.
You can also adjust the POI by changing the spine of the arrow or the nock point (I know, you already adjusted these things to shoot level bare shaft, but Rick doesn't care about that, unless it is so out of range that it causes irregular fletched arrow flight). Also be aware that when you change the spine of fletched arrows, it might move the POI in the opposite direction than you expect.
My regular bow shoots where I look. I find these techniques most useful in getting a different bow to shoot in the same place as my regular bow.