I also set a test render with these bricks assembled. It baked for 7 hours today. Here are two layer blending variations I like the most. Click for higher rez.
You can find other blends in links below:
I plan to model all axles in a free time (parts ranging from 3704 to 3708, 3737 and 4519). In this case there will more work with instancing than modeling I guess… In the meantime here’s something special for all those interested in my workflow for lego modeling: