[James Tonthat]

My understanding is that you cannot CAD up a design and use it as a finalized design as stated by the rule quoted by Alan Anderson.

But...

Designs are never final, you can always make improvements. I'd be amazed if an experimental drivetrain worked perfectly in it's first iteration and needed absolutely no improvement or change.

Take a look at 254/968's drivetrain, while their drive design may look the same year after year, they are constantly making tweaks and changes to the design.

Teams do CAD and build drivetrains in the offseason, and learn a lot in the process to make changes for the next season.