Paul,


I think the way you drew this diagram the front and rear rotor plugs will
 fire at the same time and waste a spark.  That is the way Mazda does it.

If we want to be kinder to our plugs, we have to separate the sensors in
the axial direction.  For example one sensor is inboard and the other
mounted at least 3/4" further outboard.

Solution 1 - Two plates, with one projection each.   3/4" spacer in
between the plates.
Solution 2 - One plate but with one of the projections bent in a dogleg
to clear the  inboard sensor.


Doug in Japan

Yes. You are correct.  Two wheels and off set sensors fore and aft will prevent that.

Paul Lamar