Dom,
Something else to consider would be Widget's switch setup. I asked him about it under
here (post #19/#20). Reference pics are 002_0114.jpg, 002_0115.jpg, and 002_0116.jpg from his
router page . You might need to go to a variation of this kind of a setup to get your normally closed situation. Some of the more expensive switches have both 'no' AND 'nc' connections.
Rance