# Inventor Chassis: Best Practices

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Note: You must complete **Inventor Chassis: The Basics** before continuing!
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In this tutorial, you will be making the drive base below, but by using best practice techniques.  You'll learn how to use subassemblies, and to constrain in a way that makes it easier to rapidly iterate your CAD.

This tutorial works for VEX CAD's Inventor Library 1.1 and beyond. 

Please look over the [FAQ](https://github.com/VEX-CAD/VEX-CAD-Inventor/wiki) if you have any issues!

If you want more assistance, please ask in our [Discord server](https://discord.gg/BKV3DJm)!

![Completed Best CAD Practices Drive](https://3510336827-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M7yGVyBrcpSR8SDSikj%2F-MfQNKQAM5TPVSlt7Ds3%2F-MfQhn19kuZ5JLe-_r8N%2Fimage.png?alt=media\&token=89e3b8d6-f3bb-4f26-a4ad-01c32f014354)

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Your CAD will not be identical to the robot you construct.  Screws shift in holes, used spacers become slightly different lengths, parts squish because of screws, etc.  

We suggest using CAD to plan how everything will fit within your robot.  Spacing on moving parts will change between CAD and on your robot. 
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## Contributors to this Article:

* Jess - EZ