The part of 'TSA Cares' that I emphasize is not talking to a phone jockey who will just read what is on the forever 'out-of-date' website (which does not apply to individual FSD requirements, agent interpretation, individual checkpoints).

I emphasize the part about asking for a CSM to meet you at the checkpoint and escort you through. 'TSA Cares' is supposed to do that. I've posted elsewhere about the one instance where something like this happened - Stacey Amato was challenged at a checkpoint (again, after the agents had supposedly been 're-trained' but still didn't get it). The agent who challenged her was NOT going to back down...until the CSM stepped forward, identified herself and apparently had enough clout to force the agent to follow proper procedure.