That is good advice. I would never do any commercial digging, trenching or drilling without being protected. I have been through lawsuits before just doing IT work and a person would have to be insane to work without the protection of general liability. For this guy I quoted him the same as the local post hole company who uses a New Holland. Another bonus is that I am using free fuel salvaged from generator storage tanks that I really need to use before it needs filtering again.