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Multiple centered images in hover effect

Hi Guys,
I´m scratching my head over this issue. I would like to reproduce the mousefollow/hover effect from
I have a mousefollowing Div, and i have an action that triggers a class for an image to be set to visible on Hover. Hoverout animation as well.
The thing is now:

A. the images have the right classes attributed but dont bother to appear/disapper as the should when they move from one grid area to the next

B. The images in the container cant be stacked. They are boxed on top/next to each other, but i want them to appear on the same position ( Mousefollower centered)

Any ideas?

Here is my public share link: