A truely good mechanic is worth his weight in gold. Some of my friends are doctors, and they appreciate the fact that while they only work on 2 models, a mechanic has to deal with a myriad of designs. Popular Science, I believe, had a monthly article entitles “Gus Wilson and the Model Garage” Gus,who like today’s star detective solved a myriad of car problems that had baffled everyone else. Although a fictional character, I believed it raised respect for good mechanics who had diagnostic capabilities. Unfortunately, today, many lack that skill, and rely on their diagnostic machines to tell them which packaged cure (available in-house,of course) to administer. A doctor doing this would normally be called a quack. So, my hat off to truly good mechanics who take their jobs as seriously as your family doctor.