Followed SA's excellent documentation to create a test version of the new event, but was a bit thrown when it didn't work as expected (I was allowed to vote repeatedly). After some reading of the code, I figured out from a comment that the version on the test account is most likely configured this way on purpose (I can't check it because it's in SA's account), so I took the existing production code and put a copy of that in my account pointing to the dev db to confirm that it would work as expected, which it did. I've now created the prod vote, which will go live on Wednesday morning.