Attract-Mode does not allow changing the spacing between lines of your listbox, they all have the same. So if I put it with 11 lines, the list covers part of the middle selector of the list, that's why it's with 9. I attach images so you can see it.
What I have done is to occupy more space in the list and change the font for another more readable.
If you're worth it, tell me and upload the changes to mega. If you want something more, just say it, if it is within my reach, I will.