Took a few bearings to be pressed on to gears for a snowmobile gearbox. I showed them what had to be done.. One bearing was pressed on incorrectly and ruined, one of the seals that was to be installed was destroyed, and after the owner ruined the seal he tried to press the brand new gear out of the bearing and cracked the gear with a hydraulic press. He said he was sorry, he did the best he could, and refused to pay for the damage. So far, I am out 300$ for their mistakes.