The problems with die cast parts are not confined to the model railroad hobby. I am also an antique car hobbyist where the problem is well known. I once had a 1967 Oldsmobile The power door locks were vacuum operated and controlled by a manifold device hidden behind the glove compartment. This was a zinc alloy die casting that fell apart in my hand. I could not find any replacements so I carefully put it back together and encapsulated it in epoxy. It worked fine. Incidently it s sometimes called pot metal because its been said that anything left at the end of the day was thrown into the mix.
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