I like the idea of adding extra anode wires to within cavities to get better coverage that this document suggests.
My favorite type of nickel plating for home scale is nickel acetate. It can be as simple as a 6v lantern battery, a nickel guitar string, and some vinegar (though guitar wires make terrible electroplating electrodes since they break and fall (something this document says can be mitigating by using a titanium basket)).
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