Private wrote:
Thinking that your server was busy, I made several attempts during last
evening and again this morning but none were successful.

My fault; I had something configured incorrectly on the server. I just
fixed it (0310 UTC 6 Apr), so the PDF downloads should work now. Sorry
for the trouble.

Since I am experiencing some age related vision loss, I wondered if
this could be contributing to my problem.

It could be. I have a page hosted elsewhere that has a similar color
scheme. Nobody has complained yet, BUT I'm fairly confident that the
readership of that page is mostly about 20 to 35 years old.

Thanks!

Matt Roberds