Limb upgrades upgrade upgrades. You upgrade these when you have the upgrade with the limb. When you go to the next upgrade of the tower, you cannot edit limb upgrades of previous upgrades. They only have 1 path/4 upgrades. This is a public compilation. It is open to customization. When adding customizations, please add separate sections. No one can edit other people's sections, and each section is counted as a separate conception, so the policies apply individually for each and every of those sections. If you have a good reason to remove public status, please contact the page manager.