>Ooops . . supposed to be cm not mm. You must have a hawk eyes !!!

Yep, several... one 1.5 for monitors, one 1.75 for books and handhelds, one 2.0 for the future, and a couple of spares :).

If that explains anything, I did a lot of DTP in my time (remember that acronym?), put together a couple of books and maybe a dozen issues of newspapers and magazines. That's a real training for the eye... except that it usually happens that when six of us have spent all night (and a large mug of coffee) checking everything to the last detail, a huge typo passes unnoticed smack in the middle of the front page headline. Murphy never sleeps.