Agree with you colin I also have stopped using the one thats on the new system the boss always looks streesed they have 4 testers and none want to do the test anymore they argue between themselves who is going to do it. what finished it off was they failed a vehicle that wanted the slightest bit of welding that the tester poked through with a screwdriver and then told me they coulnt do a retest for 2 weeks and it would be a full test and by another mechanic.