You state that you keep the test strips on file in the event your customer would like to review them. Are you aware that Test Strips overtime will relax? Depending on how close your are to .006N you may find your strips out of tolerance at some point in the future.
In AMS 2430 section 4.3 a lot of parts can be any group of different part numbers as long as the intensity is verified by the same fixture,set-up, machine, machine parameters and in increments of not more than 8 hours of machine operation.
My suggestion to you would be to design an Almen Test Fixture that represents all the intensity verification areas for the entire family of parts you process. Then record the beginning strips, ending and or 8 hour in your logs as you are doing now. Then send all the test strips to your customer with the parts when shipped.
