The best replacement for n scale is ho scale.

The best alternatives to n scale are rated as following:
★★★★★  ho scale
★★★★★  ho
★★★★★  z scale
★★★  o scale
★  ho scale trains
  ho trains

Your alternative for n scale is not listed? Suggest!
Speaking about n scale, one probably shouldn't forget about dcc controller.

Other search terms related to n scale and their ratings are:
★★★★★ dcc controller
You have in mind a companion for n scale and it is not yet here? Propose!



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