The pin above middle finger with cg on center line is a universal drilling, of course meaning it will work for both. DEpending on the core and your style these drillings either go long and snap or roll evenly. Most of my stuff is drilled like this.Pin Below middle finger with a close cg would be a pin in drilling, the ball will roll earlier, unless you have good oil length this drilling might make the ball burn up and not hit well as a result.