I would say the time to do that is October and not November, so do it. This is the sort of midstream switch that prepping is meant deal with. I don't think I would go back and rewrite challenge items things that were impacted though.

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Regards,
Eric Fretheim

"It is perfectly okay to write garbage-- as long as you edit brilliantly." ~C.J. Cherryh

"Success is the ability to go from failure to failure without losing your enthusiasm." ~Winston Churchill

“No, writing 50,000 words in a month is normal. You are not crazy. This is not insane.” ~Teri Brown