By made your own bung do you mean welded some jam nuts together? If so I have done that in a pinch.
Jesus****ingchrist no! I cut the ends off a threaded draglink and welded them into a larger piece of tube. There is at least 3-4" of thread in the ends I cut off.
On the 8th day god created the Super Swamper TSL and said "go forth and kick ass"