An electrosurgical system comprising: an excising wand having more than one extendable electrode arms configured to extend a cutting electrode coupled to the electrode arms from a stowed position to a deployed position, wherein, during the extension of the electrode arms, the cutting electrode is configured to be energized with RF energy to cut through tissue proximal to a target tissue for the electrode arms to form a receptacle surrounding the target tissue, wherein each electrode arm includes one or more eyelets (362A, 362B) at a forward tip of the respective electrode arm and wherein the cutting electrode includes one or more cutting cables employed to extend through a forward eyelet of the one or more eyelets on each electrode arm and then tied off at a second eyelet of the one or more eyelets of a nearby electrode arm; and an RF generator having an output operatively coupled to the excising wand, the RF generator comprising: a power circuit; a current monitoring circuit having a current sense output associated with a measurement of current flow through the cutting electrode; and a voltage monitoring circuit having a voltage sense output associated with a measurement of electric potential applied to the cutting electrode; characterised in that the generator further comprises a controller configured to determine an output power of the RF energy by determining a differential phase angle based at least in part on the current sense output and the voltage sense output, to select a control setting for the excising wand from a plurality of control settings, each associated with one or more different wand types, and to adjust the RF energy outputted to the cutting electrode based on a comparison of the determined output power to the selected control setting. an excising wand having more than one extendable electrode arms configured to extend a cutting electrode coupled to the electrode arms from a stowed position to a deployed position, wherein, during the extension of the electrode arms, the cutting electrode is configured to be energized with RF energy to cut through tissue proximal to a target tissue for the electrode arms to form a receptacle surrounding the target tissue, wherein each electrode arm includes one or more eyelets (362A, 362B) at a forward tip of the respective electrode arm and wherein the cutting electrode includes one or more cutting cables employed to extend through a forward eyelet of the one or more eyelets on each electrode arm and then tied off at a second eyelet of the one or more eyelets of a nearby electrode arm; and an RF generator having an output operatively coupled to the excising wand, the RF generator comprising: a power circuit; a current monitoring circuit having a current sense output associated with a measurement of current flow through the cutting electrode; and a voltage monitoring circuit having a voltage sense output associated with a measurement of electric potential applied to the cutting electrode; characterised in that the generator further comprises a controller configured to determine an output power of the RF energy by determining a differential phase angle based at least in part on the current sense output and the voltage sense output, to select a control setting for the excising wand from a plurality of control settings, each associated with one or more different wand types, and to adjust the RF energy outputted to the cutting electrode based on a comparison of the determined output power to the selected control setting. a power circuit; a current monitoring circuit having a current sense output associated with a measurement of current flow through the cutting electrode; and a voltage monitoring circuit having a voltage sense output associated with a measurement of electric potential applied to the cutting electrode; characterised in that the generator further comprises a controller configured to determine an output power of the RF energy by determining a differential phase angle based at least in part on the current sense output and the voltage sense output, to select a control setting for the excising wand from a plurality of control settings, each associated with one or more different wand types, and to adjust the RF energy outputted to the cutting electrode based on a comparison of the determined output power to the selected control setting.