It in many ways it just became a selling feature. Every improvement, with just a very small exceptions, was a minor incremental change, some for the better and some not. But all became a marketing feature. Some of the quad bolting systems were such hype that few understand that most only really locked on one surface with the other three non working and only really as backups. If perfectly fitted theoretically they all four could work at the same time. The two I’ve had and checked had exactly one working and three spares. But four has to be better than one, or two or three. Right?
