> I screwed a #4 x
> 3/8ths" stainless steel pan-head/phillips head screw into that very
> small gap between the core and the outer ring.

I interpret this to mean the screw forced the inner and
outter lead into contact opposite the screw.  If there
is enough contact, he should be OK and the screw won't
even be in the current path.  But what is "enough"?

                        Richard A Jones
                        Boulder, Colorado