Fun with CAD (computer aided design)

CAD is to an engineer as oxygen is to us humans... you can't go without it.  In this short demo a couple of CAD features are displayed to give some insight into the value of investing in this type of software.  

There are a couple of high end packages on the market... the one used here is PTC' s Pro-Engineer Creo 3 package, which is also my first choice when it comes to CAD.