Design your own F1 car! Now added to Batracer
 

Batracer have added the ability to design your own team from the ground up. Choose engine supplier, tyres etc. Then hit the test track to test the Aero settings and alter wing design, cockpit design, coke bottle affect etc.
Have additional test sessions through out the season to perfect the car.

Looks pretty cool. Check out the video on the link

http://batracer.com/-1FrontPage.htm?4TJ

Constructors were added quite long time ago - probably a year already.
It indeed looks very cool, just one have to pay again for extra content

i haven't been on it for a while, looked like a cool addition

Yeah it indeed looks like great addition, I just didn't justify to pay for it yet.