I do 2 drills in one by practicing the lag, and I do believe it very important (you gotta find the speed for that table for one), anyway, I put a ball on each side of the cb at the first diamond from the short rail and 1 diamond out from the long rail. I shoot the cb up to the other short rail and send the cb between the 2 balls (approx. 3/4 " from cb) and see if my stroke is good for the day by passing between the 2 object balls without touching and then see if the cb goes to the rail from whence I began.....tests your stroke and the speed. I always do this first before the other drills. if you stroke if off what is the point of the other drills? :shrug: