BTW in the corner 5 or Diamond system as per Hoppe's book if the cue ball is located where the foot spot or head spot is , it is starting position 5.5 , the corners are position 5. The cue ball positions run 1.5,, 2, 2.5, 3, 3.5, 4, 4.5, 5. 5.5, 6. 7. 8.