TMSFNCDataGrid & custom cell layouts

Let's saya user customized a cell, and it's font size is 28, and alignment is Trailing.
I'd like to display this even when the cell is selected.

The routine works, but raises lots of AVs, most times here:
image

For example, these cells are customized and selected. Selected Layout has a gray fill and thick borders:

image

And here is how they look when not selected:
image

The problem comes when user can fully customize each cell, so the FocusedLayout wouldn't fit. It should use each cell's own font/align settings.