thanks fetor.
I bought a water-proof toggle (on/off) switch for $10 today, at lunch,
from J-Car Electronics (in OZ).
(I think I'm becoming obsessed, actually its past that stage.)
Its 15 Amp rated, so no probs with it handling what the magneto will dish out.
I'm going to mount it on the handle bar somewhere, and make use of the extra
wire that came with the standard kill switch.
(waste not want not...).
As usual.
I'll post pics when done.
WS.