Converting 36in Pro to NG. 2 of the NG replacement orifices broke off leaving a threaded piece in the valve. Huge problem. II got one of them out but couldn’t get the second one out. Fortunately Blackstone support responded as soon as I registered the grill and is sending me a replacement valve, hopefully I can figure out how to replace it. My review would be no stars but I’m giving 2 for customer service. The grill itself is amazing, we love it! The replacement  NG orifices seem to be made of defective metal to snap off so easily.