It seems to me, omdowcett, that your Boxer CRV build will suit two sections here on RCTW. One is the 3D Printing section that Ecam motes above:
viewforum.php?f=33 . The second is the Electronics section:
viewforum.php?f=31 .
This may be unnecessarily complicated, but for what it's worth here's an idea: perhaps as you work on the Raspberry PI board for your model, you could post in the Electronics section. Then the 3D part could go in the 3D section. In your initial post in each section you could explain what your project will be and refer readers to the appropirate post in the other section.
Me? I am amazed at both your idea to create the electronics and to 3D print the model. I am eager to read and learn about both.
(Unfortunately, I could not find an Amazing Wizards section, though there are plenty such here on RCTW).