those are some cool drawing.
You should keep pushing yourself with those markers, I'm sure you have the ability to go from cartoonish reality...to actual reality. 40 hours is a decent amount of time. Assuming a few hours goes into measuring? Or how do you start the drawing? Is it scaled or freehanded?
Damn...you make me want to draw cars. lol
Hypertek: that black fc is legit!
this one I like the most! great job!