An additional quote from the "letter never sent" (except to the OIG). "Are allowed" in the below first sentence perhaps should be "are needed," technically.
However, if you "go nuclear," as I hope, this problem will be solved when you pull our PC, as no DERs are allowed in a "non-PC" aircraft production system. All BCAG DERs would revert from their DER status to what the one I have seen should be instead of a DER, if even that—a "lowly" design/stress engineer unable to do final signoffs for you on our drawings.
The Last Inspector