Oh totally, please do! Reverse-engineering is one of the best ways to learn, I'd hate to get in the way of that.

The car's body design can vary a lot with little effect in this game, the real magic is usually largely on the inside. I use a mixture of well-placed weight blocks and small fins on the underside to get performance where I want. Learning that and how to make a good transmission will be the biggest steps in my opinion. Also, you might want to take a peek at the cooling system, as it's far better than a radiator and pretty compact.

Out of curiosity, would be angry if I tried recreating this solely form the pics as a way to test myself? I won't upload it or anything, I just want to see if I can fill in the blanks on how it works. I'm still new to this game and I've found that reverse engineering design to learn the concepts is the best way for me to learn.