Lot of talk here as to DI.Is it real - can you prove it? I look at it quite simply " Are you hitting more Primary Face Hits than random? I am not looking at Bone Tracker.Great for beginners - great for a player without a dice set- great for a player who does not have his shot- and great for the player who has no clue" Now I use the 2-V dice set.Outside faces are 2-2. 3-1. 5-5 6-4. Those are your primary faces.As you can see random is 4 out of 36 faces. When I toss a mini book of 36 Right here right now practice session I usually average 6 primary hit faces.What I am looking for is reaching that glorified air where eagles dare to fly.I am looking for 8 PFH' s. Will be a happy camper.