Hydronics, Circulators & Hot Wheels

Any of you old enough to remember playing with Hot Wheels cars?  I had a boatload of ‘em with about six miles of track, and would spend rainy Saturdays having a full-field drag race to determine my fastest Hot Wheel ever.  It was usually the Classic Chevy Nomad, the Silhouette or the Deora (lost the damn [...]