> > Are U-joint drives preferred over the pen springs
> > Will Quinn

> Why not just experiment with the AM pen springs and the ball/socket 
> connectors (NWSL) and see which provides the best performance?
> Matt Hogan


If you really want to seriously compare the two, I would suggest a test drive 
with a heavily loaded train being pulled up a grade.  Lots of cars or fewer 
hopper/gondola cars filled with sand.  With a heavy load, the differences 
between the two will become quite apparent.  Running the loco by itself or with 
a light load will not necessarily illustrate any difference at all.  Let us 
know what you discover.  Ed Loizeaux



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