3D Printed Staircase for Ratio Midland Railway Signal Box

Design preview. Rendered from the file, not a photo.

The maker says it fits: Peco Ratio Midland Railway Signal Box kit (N scale 2mm or OO scale 4mm). See the proof

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What it does

Replaces fiddly kit parts so assembly takes less time and looks cleaner
Fits N scale models perfectly; works with OO scale versions too
You get a pre-designed staircase so you skip tricky step-by-step building
Prints on demand, so your part arrives ready to attach to your model

Build your model railway display without wrestling with tiny pieces. This 3D printed staircase slots right into your Ratio Midland Railway Signal Box kit, letting you skip the hardest assembly steps and move straight to finishing your layout.

The staircase replaces the kit sides and individual treads that builders often struggle with. It comes pre-shaped and ready to use. You just attach it and continue building. The design works great for N scale models at 2mm scale; it may also fit 4mm OO scale versions, so check your kit before you order.

Print it on demand means you order it when you need it. Your staircase prints fresh and ships to you, no waiting for stock or guessing about quality. Your model railway project gets the clean, neat look it deserves.

2.0k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What it fits

The maker says it fits: Peco Ratio Midland Railway Signal Box kit (N scale 2mm or OO scale 4mm)

That is the maker's word, not a fit we measured. Check the size below against your own.

Peco Ratio Midland Railway Signal Box kit (N scale 2mm or OO scale 4mm) (model 2mm)From the maker's own listing notes, checked 2026-08-13. See the original post

What you get

This design prints as one piece.
Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PLA. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.