Even if the hole is large once you use a dreemell drill bit you can pass a matching steel rod same diameter of the inner dia of the copper tube befoer you coil it up and use e small hanner to tap arround the hole . This willl cause the hole to become smaller and slove your pinprick size for the jet diameter. Oil the steel rod to allow easy witdrawal after you tapp the hole ...
As copper tubing is soft copared to steel a broken off sewing machine needle stuck in the the bottom of a dowell will do. you can rub the dowel btwenn your palms while pressing on the top tip of the dowell witha coke bottle cap pressed down with your chin. I have done it. Just tapp the hole ona stell rod inside the copper tube to make the hole smaller.
Wow, thats pretty awesome Jason! I need to have a go at making one of these someday. I bet that drilling the hole is the hardest part. Copper brake line tubing would be real ideal to make the burner out of.
