Exactly what constitutes an illegal drilling? Is a drilling illegal just because the ABC says so? How much advantage is going to be gained by having an extra ounce or two of sideweight, or whatever weight parameters are transgressed? I remember that before all of the exotic weight blocks were introduced, there were some bowlers who had one pound blocks of lead put into their balls, and gained a distinct advantage. Aren't the weight blocks of today making the balls hook a lot more than ever before, and don't these weight blocks actually weigh a lot more than one pound? If so, how can that extra ounce make so much of a difference? I would like to actually see an illegally drilled modern ball, because to the best of my knowledge, I have never seen one. How could I tell if someone was throwing an illegally drilled ball? What would I have to look for? I assume that unless a bowler goes to a tournament where his equipment is examined, he could probably bowl forever in house leagues with whatever type of ball he desired to throw. I have been bowling for over 40 years, and I have never seen anyone's equipment checked by either a league official or someone from the local association.