allow a percentage or N of the sample to pilot. for example, i might want to set the study to collect for 10%, it'll automatically pause collection upon 10%, i'll examine data for any issues, and resume collection when it's done. currently, you need to create two separate projects (one pilot, one the rest), and if you're using the redirect link for qualtrics, you need to change your actual survey (if you're using the same survey) for the second project.