1) What are the dimensions? Which one is HEIGHT?
2) How did you get from 8% to 14%? Whether it is 8% of a pin head or 8% of the Pacific Ocean, it is still only 8%. The percentage doesn't grow with the total surface area. Wait, maybe it just means you can't put all the holes on one side. 14% is really the goal, but you have to spread it around.
3) No hols in top or bottom?
1" diameter circle ==> pi*r<sup>2</sup> = 3.14159*(0.5 in)<sup>2</sup> = 0.785 in<sup>2</sup>