You may find this interesting. It shows how seriously the production people in this industry take their jobs, and their responsibility to not screw the product up inadvertently. (Screwing it up on purpose is another matter.)
In casual conversation the other night with the plant manager of the Brown-Forman Distillery (where Old Forester is made) he mentioned that they were planning to put in some new fermenters and he was going back to the records from when the place was built, in the 50s, to make sure they used the exact same stainless steel specifications. I would have thought stainless steel is pretty neutral, but apparently not, or they at least don't want to take any chances.