When designing a model rover based off of real world examples, one is forced to balance between accuracy and practicality. Not all features on a real world object should be transferred to a replica as most features will either be; 

1: Too small to be seen due to the resolution of ones tools;
2: Functionally pointless and/or never seen; or
3: Over constrain the design causing countless days to be wasted creating solutions.

With that said, the point of modelling your design after another is to not only pay homage, but to preserve the resemblance and style of it too. In order to do both, you must have access to good documentation of the parent object (what you are modelling after) such that you know its dimensions and the function of separate parts. The documentation must also be detailed enough for medium sized details to be made out with accuracy. 

Recently, I have been working on my very own mars rover based on Perseverance, and one of my biggest problems is the utter lack of real images of the rover before launch so that I can make out geometries and parts. Searching for 3d models does result in a link to the NASA website containing a 3d viewer and download for a perseverance model: