Apparatus is provided for use with at least one tissue-adjustment device, including a tissue-engaging element having a distal portion configured to engage at least a first portion of tissue of a patient, and having a proximal portion. At least one docking station is coupled to the proximal portion of the tissue-engaging element and is configured to be coupled to the at least one tissue-adjustment device. The docking station includes a locking mechanism configured to lock the tissue-adjustment device to the tissue-engaging element. At least one guide member is reversibly coupled to the at least one docking station and is configured for facilitating slidable advancement of the at least one tissue-adjustment device toward the tissue-engaging element. Other applications are also described.
