Good article Gonzo! The problem with this trade compared to almost all others is every Tom. Dick, and Harry can call themselve a mechanic/technian and work on stuff. They don't carry insurance, have almost no training or none, have a few cheap tools, and hang on the cheapest parts they kind find. They collect the money and if there is a big screw up the person who paid them is SOL. We have worked on stuff like that where the mechanic didn't replace the stuff they said, sold used parts as new, used JB Weld to fix freeze plugs, and Right Stuff instead of a proper gasket. They put Bosh spark plugs in everything and generally have little clue as to what they are doing. If there is a problem they just disappear or refuse to do any warranty work. Other trades are more regulated. Most plumbers, electricians, carpenters, concrete guys, etc. can't get away with that stuff because there are government license, inspections, permits, etc. and often they are working outside or have a truck parked outside which an inspector sees or a licensed tradesman calls in. I personally don't want more government regulation but on the other hand it would eliminated some of this stuff.