Telescope question time!

Do you have anything you want to know about the telescope site? At the end of this week is the annual open doors day here at the IAC (and this is part of the reason we are here for these particular weeks). For two days all the telescopes open up and tour groups are lead around to see what they do. In the spirit of this, we want to know if any of our users have anything they want to know?

If there is anything you've always wondered about the site and how it operates, whether highly technical or just something simple, or if there's anything you'd like to see a picture or video of, or if you want to know more about the repair work we are doing here, post your questions on this forum thread and we will try our best to get through them all.