Glad to see it's not just me who needs to edit posts for the stuff I forgot Vos!!
Those are lovely spirals you've achieved, I'm sure Steve will say no problem hallmarking where you have indicated. Though you may get a little distortion or flattening on the reverse.....just tweak the general shape with your original forming tool(s) and buff the reverse and all should be well!!
Looking forwards to seeing the finished result!!
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