This morning, magically, I was able to download all of the
presentations on both of my computers! The most frustrating thing is
that I did absolutely nothing different from what I tried,
unsuccessfully, previously.

I'm guessing the problem lies somewhere in the "share" portion of the
geocities web site (the place where the presentations actually
reside), as I could always get the John's "presentations" page.

John, my sincere thanks to you for writing these topics up. I found
the "Wiring Avionics" presentation particulary useful - it was worth
the geocities hassle!

-John