You're missing a huge opportunity here! Put a ramp on the back of the moving robot arm carriage. Once the car is complete, move the carriage into place so that the ramp is lined up with the car press and use the conveyer belt to push the car down the ramp and into a "parking lot". That way it literally rolls off the assembly line.
sorry, no instructions available ... that's too much work! ;) ... as for the code, that's so very simple, just one action after the other, but I can send you that! ;)
