I have cut the shunt in this photo which arms the pyro.  Remember the Gwiz is up and
running through this whole procedure.  Cutting the shunt should only take place while the
rocket is in the tower and launch is imminent.  Cutting the shunt early increases
your chances of doing harm immensely.

Should the rocket need to be recycled in case of igniter or other failure, peel off the tape,
strip the ends of the shunt wires, and twist the ends together recreating the shunt.
The rocket is then safe again to move.