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As for those of you who're "view only" and haven't been able to edit the spreadsheet, Mere Tantalisers claims to have solved the problem (at least for himself). Copied word for word:
I had this issue and just figured out that the problem was my Google account email address (personal) being different from the one I used to send the `registration' email (work). I just changed my Google account settings and its fixed. So that's one thing to look at for those having the problem.
So, enjoy. This one should be a lot more interesting than the Johjima projection, that's for damn sure.