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...
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...
Try replacing the Jet nipple with a motor cycle Carburator Idle jet nipple. Thay are fire resistant and small in size. Only available from Alibaba...
Also remember the Thick wick is absolutely essntial to keep the back pressure of the gassified kero away from the fuel tank. Capillaric surface...
Hi! Been Surfing the Youtube Channels and Found an Answer to your dilema at: [MEDIA] which is a video to "Restore OLD World War 2 Kerosene...
Separera namn med ett kommatecken.