EdwardT, I will give you my answer to that question, "What is properly trained mean". I believe properly trained means having many years experience not only at some kind of certification level for most units, but also numerous successful repairs made on hundreds of service calls. Safety parameters on most class specific units are close to the same. Granted there are some flukes between makes that are particular to the manufacturer, but for the most part you know as a "Years of Experience tech" whats important. Articulating axles on reach trucks, steer axle stops, wear limits etc. all relate to safety and are only a few I will mention. Also with many years of road service experience you know that bumping into competing techs helps and friendships are made. Phone numbers exchanged and such all leads to a localized but effective resource bank for all involved. "Properly trained" to me means years of experience doing it successfuly, and the resources available locally to get answers on stuff your not too sure about. Also, if I as a tech dont know what to do on the repair, stopping and getting an answer before attempting to fix it shows that I am properly trained when its a safety issue. An extra two or three days of the unit being down kinda blows, but its better than feeling pressured to fix it, and having it all go south on you after a hurried repair.