Just an FYI regarding metal couplers. Kadee is phasing out the 40-series metal couplers that come with the bronze centering springs like the #5. They are being replaced with the 140-series metal "whisker' spring couplers, e.g., #46 is being replaced with the #146 whisker, #47 with #147 whisker, etc. The #148 is the "whisker" equivelent of the #5, but according to the Kadee website there are no plans to phase out the #5. It's too popular.
Len
Len