Hey everyone, I'm Charlie. I'm a mechanical engineer specializing in fluid power system design for mobile equipm,ent. Not necessarily new here, I've gotten a ton of great information from PhysicsForums throughout my career. I'm a dad, car guy (working on a 69 Camaro project), tinkerer, DIY'er, amateur woodworker and I have a website where I write about engineering applications for Microsoft Excel at http://www.engineerexcel.com. Looking forward to joining the conversation!