In reply to ismael peña-lópez.

Well, Ismael, I noticed that you left your first comment in 2004 http://jarche.com/2004/11/OLD354/ and that Luis started commenting in 2009 http://jarche.com/2009/03/seeing-with-new-eyes/. I've been reading both your blogs for many years now, as well as Brent's more recently. I must say that the personal connections are the real value of this blog :)