Autodesk Inventor R4 engine

Since my university allows me to get free educational license, I'm mainly using Autodesk Inventor software and most of my work is done with this environment. This is one of my first models I've made some time ago. It's a simple R4 engine design, made to get myself familliar with assembling and placing constrains correctly. It's based on Catia tutorial that can be found on youtube somewhere.

rendered image:

and a screenshot directly from inventor