I thought the beginning was very solid and easy to recognize. But when you broke into the harmony, it became chaotic and hard to identify. I don`t think you will be able to get that section much closer than you did, because your using a car that can change directions hit your bottles at different times. I recommend making a track for the car to follow on and setting up the bottles with a large straight edge, and checking each angle to make sure its a perfect 90. Mark the bottles with black magic mark according to pitch. Very good job though. That took alot of work.