At LEAST 2 weeks to clone, in my own experience. You can snip your fans if you want to. That's gotta be your decision. Cloning isn't that hard so you could take a few and toss Mama into 12/12 without awaiting confirmation that they've (clones) have taken.
Once again, that's up to you and your confidence in your cloning abilities.
Good luck.

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I'd giva ya everything I got . . . for little piece of mind