Hello George. Many thanks for the explanation, I think the plugin being built with responsiveness in mind is a very good idea.
With my question, I was wondering more about the size of the thumbnails. Let me explain with two pictures from one of your example maps:
This is the popup with a single image.
And this is the popup with two images.
I was wondering whether there would be a way to keep the thumbnails sizes consistent, i.d. same size for all of them: when hovering different points on the map, I find it a bit confusing that the images keep changing their size, according (I suppose) to the amount of images available.