...thanks Zen. When I look at this in Chrome, the first post looks like this...

...missing the image for the Rainboard and the small Dualo. In Firefox, the Rainboard shows but the small Dualo still doesn't.
Actually those two replacement URLs I posted above don't seem to work any better, but I've put them on Imgur and they work from there with
img tags.
https://i.imgur.com/6rEdPjJ.jpghttps://i.imgur.com/4pa998x.jpg