turning brake drums, surface flywheel-amazed!

I have found that most of the disposable rotor replacements are warped to some degree by the time they are purchased. My last example was rotors for the son-in-laws car. He got a new set of rotors from Oreilly and the car shook like crazy after installation so he asked me to take a look. The rotors were obviously not true. We took them back and got a different brand. Installed those and they were warped too. Took them back and returned for credit. Discovered while we were there that the rotors are stored standing upright (or actually leaning) on the shelf. Went to Auto Zone and got their set. Installed to find they were warped. Returned those and went to NAPA. Told them about our luck with rotors and they said if they don't run true to let them know. They had a slight wobble when installed. When we called they said to take them to a local repair shop and they would be trued up on the NAPA account. The shop owner told us that almost all of the new rotors they buy need to be turned before they are installed...between poor quality control and handling/storage it has become a real issue.