A slip ring assembly for allowing electrical or electronic signal transfer between a stationary device and a rotating device includes a ring assembly and a brush assembly. The non-volatile memory of the BMC has a file system mounted thereon. Mounted at the distal end of the catheter body is a mapping assembly having at least two spines, each having a proximal end attached at the distal end of the catheter body and a free distal end. The first and second winding devices are attached to the middle column. Alloying additives as well as grain growth inhibitors may be incorporated into the superfine materials. Each gripper has a flexible padding layer disposed thereon for securely gripping a trunk of a Christmas tree.