These are CAD pics of my "X2" speed run car. I initially designed the whole car in CATIA V5 then did some tweaking in Solidworks. I started designing it in late 2005. There are a couple different iterations that the car went through before I started to fabricate.
I had initially designed it with a Lehner, then I switched to a Neu. My first design used a 1/8 scale type wheel connection then I switched to a 1/10 hub. I am still testing the X2 today.