Joost:

OK, I finally found a flaw in the singer... From these pics, it looks like the filler cap should be a tad bit more to the rear (aesthetically speaking) Might be the high viewpoint though, and I am really nitpicking here. Still absolutely love them :-)
BTW, I see one of the cars doesn't have the front filler cap... is it an option? And if so, what is the alternative position?

Shhhh .... I refuse to accept that there's any flaws with this car Smiley