storing a seed phrase with washers has very few benefits unless you think that youir house is going to burn down. but if you thought that you could just store a separate copy of your seed phrase ON PAPER in a bank deposit box or someplace else. if you ever have to travel and bring things with you then you might be screwed if the TSA needs to inspect that strange looking device with a bunch of washers on it that showed up in the x-ray machine because it is metal. they might think it is an explosive device or a silencer for a gun or maybe it is got cocaine in it. at the very least, they might take it apart and inspect it more closely and in doing so they will know your seed phrase. then they will ask you what it is. and if you tell them what it is then you just told them how to take all your money.

what someone thinks is a rock solid indestructible way to store their seed phrase could become a serious liability too.