Or another idea: the puzzler who finds the final car wins 1 point and can post an alternative car to keep it going...in this case, assuming that after Porsche FLA no-one can continue, I will go back to "Porsche 962 Derek Bell Signature Edition" and post, let's say, a Porsche 911T. In this case, each one of us can try to end it, but we can also keep it going.
Just an idea.