Detail and Preparation

Saw this in the Fb group HO Fray Cars and Racing... it was a post by Kenneth C. Stephens. He posted the following:

For those trying to find that little extra something.... 
or those that say “why is this car so loud?, everything is new”......
Just like painting, it’s all in the prep.
Just trying to help a brother out....
What’s in your race car?

As you can see the first picture has burrs and rough edges and the second picture the burrs are removed and the gears are polished.