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You answered your own questions Cjtamu, and you're spot on.

The shoe should sit as flat as possible on the rail from toe to heel. Rich's tuning articles are a great resource for this.

I think the pinion under load keeps the crown spaced properly. It would be a problem if the axle didn't spin freely in your fingers and the gears were binding.
 

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I noticed that my new Auto World 4-gear cars have wobbly wheels and are gutless. So I'd like to fix them up.
Oh my. That's a can of worms I happen to be going through right now. 4-gears have all sorts of mechanical issues.

1) The cluster shafts are loose
2) The armatures are often missaligned in the chassis because the top and bottom parts of the chassis don't line up well
3) Wobbly wheels/tires
4) The idler gears are sloppy

That's just the quick notes. There are other issues.

But like Model Murdering says. If you take the time to work through each section. You can resolve most of the issues.

Merry Christmas to all!
 
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