Not too difficult to clean up with a solvent. The rotor had the Command Modification spiral spring fitted. When correctly assembled and with jaws locked this exerts a torque on the toggle forcing into the locked position which is 'over-centre'. When power is applied to the rotor electrical coil it tries to rotate and as it does so the toggle link is pulled over-centre in the reverse direction. A soon as the toggle 'breaks' the jaws spring open.