Cheers Mark,
If you manage to hurt yourself after that amount of thought has gone into the safety system then you shouldn't be operating machinery.
Can we assume from the wiring diagramme from Greenfield and what I assume is a photo of the back of the ignition switch (Bondy, is that the back of the ignition switch in one of the photos?) that this beastie has a simple magneto kill arrangement?
Apologies Bondy for seemingly steering this topic off course but it is related to your problem.
