This specification describes technologies relating to software execution. The stabilizing apparatus includes a body having one or more elongate stabilizing pods including at least one cavity for containing a calculated volume of air. The supply roll has a wound supply of liner wound thereon, and the liner has an adhesive carrying surface with an adhesive provided thereon. A second detector head may be mounted and coupled to the loop to monitor loop integrity by detecting or failing to detect the responsive identification signal from each transducer.