S Scale Standards & PRSL
Bill Lane
Actually the NMRA adopted the NASG http://www.nasg.org/index.html standards about 20+ years ago. http://www.nasg.org/Membership/NASGStandards.htm
The previous NMRA standards were a little loose allowing a car to hunt the track gauge. We went from code 125 wheels to code 110 and slightly increased the wheel back to back.
If you want to talk PRSL here is a good place! http://www.prslhs.com
Thank You,
See my layout progress at: http://www.lanestrains.com/My_Layout.htm
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