Apply the solder to the top of the jet, not the bottom or where the threads are. The top is where the screw driver slot is. When we say don't fill the whole jet we mean just enough solder to close the hole at the top. There is no need to fill the entire jet orifice which would be the full length of the jet.thaaaank you, its all coming together now..
You said start from the threaded side & go upwards,
Now if you dont drill the full length of the jet body, how does one know where to stop?
Did you watch my video? It shows the process.
Tom