I recently purchased the 1150 Pro Series and have done a number of cooks on it at variant temps. I use multiple independent temp probes to monitor the internal temp and it varies 100 degrees from the left side of the grill to the right side when set at 350-400. At lower temps the variance from side to side was 50-75. I emailed customer service and they indicated there would be a variance due to the fan blowing left to right but that is way too inconsistent. Any suggestions would be appreciated.