I’m gonna have to try making one of those. Would it help any if the holes were a little more precision? Using a small drill bit or dremel tool to make them? What is the purpose of putting the coin on top when you light it?
The penny stops the fill hole from flaring up. Its just a stopper.
I did an experiment tonight and added 8 jets to to my 8 for 16.
I think 8 worked better to keep the pressure up.
You will have to experiment with the jet size too.