Looking for link to site: Suiter star testing on a telephone pole insulator

A couple of months ago I got interested in Suiter star testing. I ran
across a site demonstrating the use of telephone pole insulators for
this purpose. Then I misplaced the link. Does such a site ring a bell
with anyone? A link would be appreciated. - Canopus56 P.S. - I have
and have read Suiter's book.

If you have Suiter's book, there is a table showing the distance versus
aperture where the glint of light from an insulator has less than 1/4
wave or 1/8 wave of spherical aberation. In any event, a glint several
miles away almost always suffices.

Thanks for the tip, Mitch. I was aware of the above and was looking
for a more detailed construction on estimating the glint size in the
insulator, which does not have a perfect spherical shape. - Canopus56

The nice thing about using a glint is that if the surface of glint does
not produce a spherical wavefront, it is easy to see in the optics! IT
looks, well, oddly shaped. In any event, a couple of miles works unless
you have a 0.5 meter sized scope.