Flushing is a topic many growers argue about because studies have shown it doesn't reduce the nutrient content in the bud. Towards the end of flowering, plants eat significantly less, so a flush or large feed reduction won't starve the plant and inhbit THC and flower production. I would flush, but make sure you are actually in your final two weeks and this week start to reduce the feed to prep the plant for the flush. The flush is LESS important than keeping your plant healthy all the way through its' life. Nothing is worse then having to harvest a plant early and losing a lot of time and yield/ Good luck and happy growing!