Was just on the GrillGrate home page and found custom GrillGrates for the series 100, 200, and 300 Q's. I use the orginal set of 3 GrillGrates on my Q's and am always pleased with the grill marks and the ability to flip the grates over and use for a nice sear on fish, chicken, and meats with no flare ups. My Q300s need new grates and I just might go this route instead of replacing the old rusty grates I am now using. And-- you can run them thru the dishwasher if needed!!!