"Smarty" wrote in message
...
mm,

Your wording is better than mine. I struggled with the best way to state
the details, and eventually drew up a schematic / wiring diagram and
mailed it directly to the original poster since his email address with
publicly shown. It is much simpler to follow the diagram than it is to
describe it in words.

I am reminded of the challenge I was once given by an English teacher:

Describe in writing a helix without using either a drawing or your hands
to illustrate......

Smarty

We were challenged to describe a spiral staircase (similar to your helix)
and an accordian.

Charlie