Eagle - I see what you mean now. That seam is on the deep side, and I don't think sanding the arm will help - it's tapered shape will have diminishing returns if you take more away.
Easiest solution would be to attach permanently now, and then add putty all around. Use a fingertip to smooth out while still wet, this will minimize the amount of sanding afterwards. Once it's all cleaned up, you can scribe in a finer seam if you like.
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Tim - that is one fine build of the Nautilus, and I love that squid as part of the base. I think I was in like grade six when I saw the movie and was in b/w. Does the colorized version have the squid in red, or is that part of your creative influence?
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Alrighty, got the 'green stuff' on order. For lead foil, is there anything else out there other than the sheet that Verlinden offers?
regards,
Jack