[mickey thumbs]

This discussion confirms my observations over the past several months as I try to build a brass-piano wire chassis that will outperform a modern, tuned plastic one on my home wood track. One section has wide turns connected by a 10 foot straight and the other has tight turns, esses and short straights. The metal builds hug the high speed turns much better, but the plastic ones are more nimble through the tight bits, resulting in near equal lap times with the edge so far to the plastic because of the quicker acceleration of the lighter material. Great fun building unique cars trying to beat the RTR cars.