@Craig so yes deal endpoint does not allow you to pass parameters for last update time. In this case, you would need to add an output filter and we've made the lastExport date available to you. To use delta, add an output filter, choose update_time column, set column to date time under settings wheel, choose the comparison you want, choose lastExportDateTime, then choose date time under settings wheel for last export datetime. I think ideally we could have this preset for you when choosing delta type, but need some enhancements around that. We wouldn't want to override any output filters you may put there on your own if you choose to specify delta later.