A very valid point, Carnut.
We should all try to be polite and do the gentlemanly thing and give the other guy time to finish - a day or so whether it's locked or not.
At the same time, if someone knows they have no further info, they should say so if it's not somewhat obvious.
I might give little hints or clues to help out a fellow puzzler not knowing any more than that about the car.
But someone might think I do, leaving me the courtisey of time to look further.
The whole thing might be confusing to some, much like this rather uncohisive post!
And yes, I've had a point blatantly nipped from me a while back, but I can't worry about it.
This site is just too much fun to worry about points, if I've leaned about a certain car then that's all I really care about!