The rewinding machine comprises: a first winding roller and a second winding roller defining a nip through which said cores are inserted and through which said web material is fed; and at least one pair of motorized engaging members, to engage the ends of a winding core and transmit a rotational movement to the core during at least part of the winding cycle of each log. The adaptor has a drive shaft, a proximal handle and a distal instrument tip. The chamber includes a bottom electrode having a bottom electrode surface for supporting the wafer when present. The current invention includes specific tools that enable safe tissue modification in the epidural space, including a barrier that separates the area where tissue modification will take place from adjacent vulnerable neural and vascular structures.