Sheesh JLF … and without duct tape? 
John Le Forestier said:
In a momentary fit of thrift, one of the wheelsets on an Annie of mine was given an axle with a welded joint in the middle. It was, I suppose, cobbled from the end of one rod and the beginning of another. Naturally, this set was eccentric enough to make the whole tender look very silly as it wobbled down the track.
Now, in a rare example of two wrongs making a right, one of the two wheels on this axle had its hole off center too… I was actually able to twist that wheel so that by averaging the two flaws I eliminated the wobble. I then secured the twisted wheel with a drop of crazy, and the tender has run smoothly ever since! Go figure…
Gee, I wanted to impart a wobble to one of my sagged out boxcars. Maybe I should try the 2 part axle routine.
Plastic and Metal together: sounds like a federal housing program. Affirmative Traction??