In the first video I use a typical house ball drilled with a conventional grip, and my spare ball, which is a house ball drilled with a fingertip grip. A house ball has no real weight block other than a small piece of counter balance weight at the point where the finger holes will be drilled. Rather than trying to explain that I have created a link to Columbia 300, they have a great graphic of my actual spare ball
CLICK HERE. When you get there run your mouse over the ball and you will see what the inside looks like. Here is a link to show you one of my other balls that you will see on future video's so you can get the idea of how far ball technology has come
CLICK HERE.