Great this works well and the picture widths fill out kindle display screen - thanks.
There are also some instagram post references that include an image from the post just before the link to instagram. These pictures do not appear in the mobi; maybe too complicated as some are videos.
Here is an example of a static picture, in case those could also be captured.
https://www.instagram.com/p/BViqSOWhxXb/
Thanks again.