Thanks again for all of the information. When I posted this question I had already made some of the components, but after seeing the responses here I cut out the solder sections and remelted everything with the addition of 5% 24ct grain. Hopefully this will give the right quality for hall marking. I checkd with the assay office and they said that they will call if there is an issue. So the spinner ring is now made just waiting for a final polish after its been assayed.
Thanks again
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