[QUOTE Another common injury is hitting your hand when using a hammer and chisel , O.K its only a bruise and broken skin but it can hurt like hell , wear gloves. [/QUOTE] I would add, that you will find that hitting your hand with a hammer over the years will manifest itself in arthritis in later life! Also if you need to work with someone on a particular job, it is very important to make the other person aware of what move you are going to make next - I lost one third of my left thumb through not being aware! Now, this will very difficult to do or discuss, but if you consider someone to be mechanically inept, then don't let them within a country mile of your machinery and don't ask for their help, ie if you think they don't understand at least the basic principles. - This is for their safety, your safety, and for the sake of the machinery!