Hot wheels designer challenge

[Nobbles]

I have been searching for these for ages. Hot wheels asked the designers from several companies, Lotus, Ford, GM, Mitsubishi, Dodge and Honda to create a Hot Wheels car. I had read about them in Car styling etc and I loved the Lotus concept (orange one) but couldn't find one anywhere. Well a recent trip to the US and all the stars aligned, I didn't even know they did a box set. Actually the box set makes the set look fantastic with the two levels etc.