According to Hines, it seems that the regulating arm and the snail cam allow for regulation of the hairspring: the regulating arm can be directly adjusted for larger adjustments, while the snail cam allows for the micro-adjustment to 1/10th of a second that Omega’s touting, allowing for regulation to 0/+2 per day. When you adjust the attachment point of the Spirate System’s tail on the balance bridge, the tail pushes or pulls on the flexible blade, adding or removing tension. Since the blade is attached to the hairspring, this then acts on the hairspring. For example, pushing on the blade by adjusting the tail’s attachment point closer will increase tension in the blade, then causing the hairspring to increase in stiffness, causing it to beat faster.