The Madrid trip is to deliver and install a piece of mainframe software for a company over there. I'm hacking on it this week, getting ready for the trip. I'm surprising myself with just how much I remember from my days as a mainframe systems programmer (what the rest of the world calls "system administrator", as there's more to it than programming). My fingers automatically do the right thing when I need something, and it just feels comfortable. Since the last mainframe job I held was in 1996, this is a pleasant surprise.