Im sure the basics of the topic have been covered before, but in the interest of saving a little time doing the search and sifting through a bunch of responses, I thought I would ask.
I have been trying to teach myself this method of shooting. I am a mathematician by trade and would love to add a little more insurance to my style of shooting. I know that at 10 yards by gap is 17" and at 20 yards it is 26" At 30 yards it is 27" and at 40 yards it is about 19". If I were to use strictly gap shooting I know with my right eye closed I have to shoot about 12" right of the target and use those gaps to get good results.
Now with the hill split vision style am I still using those same gaps or do I change my gaps to where I see the arrow out of focus with both eyes open?