Before we do a full-on test, I'd like to send a subset of questions to a list of beta users as a pre-test. I'd like to upload their emails and have them answer a subset of the same questions the random audience would answer. This would allow me to refine some of the copy with people who we know so we have some context. This pre-test feedback could be time-limited so that it would have to happen within a day or two before the real test started.