ghost ball total waist of time. As said imagine a line straight through the largest part of the pocket drop off point, through the object ball furthest part away from the pocket. That is the contact point. what is never mentioned is also imagine a line closest edge of the white to pocket, that is the point that needs to hit the object balls contact point. No matter what aiming system u use. If poor stance, cuing no potting system will help...this is all u need to know.
keep your eyes on the spot once you have got it". This makes sense but it makes me wonder how do professionals sometimes walk around the table to check the potting angle of a fine cut and the completely take their eyes off the point while walking back to the cue ball? How do they remember a point on the object ball? Or it it something else that they are looking for when they go to check the potting angle?