Pretty darn simple to re regulate these things and change orifices.
Or just make one from parts.
The orifices and regulators determines the BTU's and what gas you use.
For a regular outside grill you need to put a kitchen stove regulator in line with it.
This is direct from the guy at the gas place.
Once this is done you adjust the oxygen to get just below the yellow flame at the end of the fire.
The kitchen stove regulator has a direction thing inside one way is for LPG the other way natural gas.
Well it isn't simple but I know how to do it.
Here is a better option.
There are many to pick from.
This one is 8,500 BTU's.
You will also save a ton of fuel.
https://www.google.com/aclk?sa=l&ai=...QvhcIOw&adurl=
Worth