Steve Jobs called his designer at 2 in the morning one night while they were working on the iphone. The designer answers the phone- "Yes Steve?" Steve Jobs says- "Well, you know, in the back of the iphone there is three screws". The designer responds- "Yes, but thats inside the phone, no one is ever going to see those, don't worry Steve". Steve Jobs then replies- "Yes, but we know those screws are there, and two screws is a lot better than three. Fix it". Steve Jobs reminding me that the details matter.