@MELGAR posted:Didn't I also mention that:
"The wheel and rail are not microscopically smooth so roughness is present to develop traction"
MELGAR
Mel, yes you did'... Inherently, I've noticed in many of my posts it appears that they are not being read, or what is read is not comprehended... I don't think people read anything more than two or three lines..... and move on... It is just another product of the times we live in...