Step 4Gasflow
I used superglue for the but there are a few gotchas...
Firstly if you just don't have the tube, you can substitute by removing a piece of insulation from a wire and using this insulation as the tube. I have done this using a toothpick to flare out the end of the tube so it would fit over the brass gas outlet on the lighter ( see photos ).
The tube will flex as the gas is delivered because the valve is opened by moving the assembly upward. This means we will have to leave plenty of wiggle-room for our tube as it travels to the chamber.
There is a little sometimes yellow spongy disk surrounding the gas outlet on the lighter. If you get superglue in this which is almost inevitable, the valve may not fully close and you will lose all control of the ratios and lose your gas as well. It may be best to remove this. I have simply been careful and kept it compressed when glue got into in it (i.e. let it close as it normally would--don't hold the valve open as the glue cures).
The joint between the tube and the brass fitting is not going to be strong. It will be gastight, but not physically strong. You will need to be careful in the next steps to protect this.
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