I ordered the Don Godke about 3 months ago after owning my GMG JB for 3 years. I have tried everything to get even temps on this grill. Before the downdraft my temps from left to right could vary well over a 100*. The higher the set temp, the bigger the spread. I have tried both the old style heat deflector and the newer SS 1 piece. Both still had uneven temps
I just found time about a week ago to put it on. The first thing I did was run tests at 180* 250* 350* and 400*. At 180*, and 250* the grill was within 10* in all four corners, at 350* and 400* the grill was within 20* in all four corners. This was better than I expected.
I have used the grill for two cooks since the test, both with similar results to the test run.
I so happy I may order one for my GMG DC