Not every screw requires the full number of spacer rings if they are used skillfully. Remember: the platform that will later be mounted on the screws is a rigid system that connects all supports firmly together. For example, if one support moves to the left, then the ones next to it will also move to the left – if you plan this in, you will only need a few spacers. It helps a lot if you take a bird’s eye view of the trees, screws, supports and spacers.