After reviewing the revised plan, allow review-only drafting on the same task. Keep unknown facts as placeholders and keep scheduling and sending off. Read the invitation, the registered-attendee logistics reminder, and the follow-up outline. These drafts are saved in the task thread. They are not Campaigns assets or sent emails. For a precise revision, quote the replacement opening and say what must stay unchanged. Send the request once. Reopen the task and check the saved opening: Build one small practice that fits your ordinary week. The remaining placeholders and reviews still apply.