A system and method for in-service migration for a Virtual Local Area Network, VLAN, service if a Provider Bridge Metro Ethernet Network, PB MEN, is upgraded to a Provider Backbone Bridge, PBB, MEN or an Internet ProtocolMulti Protocol Label Switching, IPMPLS, MEN. Structural members are inserted into the portion to help retain the desired shape of the balloon. The companded data string is reduced to a length of k\u22121 bits for more efficient storage. Real-time access to a content can also be facilitated by utilizing existing watermark extraction records. This ensures that all user information can be read and recorded reliably, while the storage capacity of the record carrier for storing user information is not reduced. This can also be done by use of rotary actuators, possibly mounted in combination with a gear unit, which rotate the suspension ballholder directly about the axis of rotation.