So my orifices show no markings and I have lost my feeler gauges years ago. But I did do some quick calculations based off the kJ rating on the grill and came up with the following calculations. The inner burner is 6999 BTU per the label. Which at 11" WC would need an orifice of either 1/32" (.0313") which would yield 6843 BTU or .032" #67 drill which would yield 7153 BTU
The outer burner is 13750 BTU. So an orifice in 11" WC LP would be either #57 (.043") yielding 12916 BTU or a #56 (.0465") yielding 15106 BTU.
These were as close as I could get. I suspect since the whole assembly is built in China it's all in metric which given all this is already making my head spin