The product was only used for a few days and was sent back. The concept of all quick release skewers is a great idea, but I've found many problems applying it. I pre-drilled the pilot holes with a 1/4" hammer drill to avoid breaking the rail, but in the hole saw the included holes are slightly larger than 1/4" and eventually broke the rail. Bits that usually take months. Also, two days later, one of the quick release bolts broke and the ball joints fell out. I work as an electrical contractor…