I found a pretty consistent position to play the opening safety break. It worked pretty well for me time and time again. The corner ball that the cueball contacts dies close to the foot rail rather than bouncing up for a shot. I have a 12mm tip. I don't know if that matters. I also would think you'd have to experiment depending upon your particular cue's pivot point to account for deflection.
1- Place the cueball on the head string 1 full ball width from the 1st head rail diamond toward the long cushion.
2- Place your bridge pivot point even with the long rail 1st diamond.
3- Aim center cueball directly at the object ball edge.
4- Leaving bridge in place, pivot about 1 1/2 tips for outside english, and 1 tip low english
5- Don't aim from here, just stroke with enough speed for cueball to fall on head rail cushion.
The cueball swerves on this shot significantly, and the extreme english rolls off of the corner ball, keeping it from picking up much spin or speed.
1- Place the cueball on the head string 1 full ball width from the 1st head rail diamond toward the long cushion.
2- Place your bridge pivot point even with the long rail 1st diamond.
3- Aim center cueball directly at the object ball edge.
4- Leaving bridge in place, pivot about 1 1/2 tips for outside english, and 1 tip low english
5- Don't aim from here, just stroke with enough speed for cueball to fall on head rail cushion.
The cueball swerves on this shot significantly, and the extreme english rolls off of the corner ball, keeping it from picking up much spin or speed.