RC Modular Rail Shelf System

The RC Modular Rail Shelf System is a modular, space-efficient solution for displaying and storing RC vehicles of varying sizes using a rail-based support system and 3D-printed components.

The current configuration uses a vertical wooden dowel as the primary mounting structure, with additional mounting options planned through milestone unlocks.

The system consists of:

• Base mount that accepts a vertical wooden dowel

• Sliding shelf modules that lock onto the dowel

• Dual-rail arm design, allowing two adjustable support arms per shelf

This design allows you to display anything from lightweight crawlers to larger buggies while keeping parts count low and strength high.

Hardware Requirements

• Wooden dowel rod: 25.5 mm (1") diameter, any length

• Fasteners: M4 x 3 set screws (any M4 screw should work, but may protrude out back)

Vehicle Compatibility

The included arm sizes cover a wide range of common RC platforms.
If your vehicle doesn’t fit perfectly, verified purchasers may request up to two custom sizes per purchase, added to the model at no extra cost.

To request a custom size, provide the following (in millimeters):

• Inner width between front and rear tires

• Outer width between left and right tires

• Estimated vehicle weight

• Base dimensions (optional, for alternate print bed sizes)

• Dowel rod diameter (optional, if different from 25.5 mm)

Custom sizes are added publicly so all users benefit.

Why This System

• Modular vertical design (expand without reprinting bases)

• Supports multiple RC scales and weights

• Minimal hardware and easy assembly

• Community-driven expansion through milestone unlocks

• Ongoing support for verified purchasers

Milestone Unlocks

All milestone additions are free for everyone who has already purchased the model.

• 5 purchases/downloads
  → Alternative support arms with wall-mount compatibility

• 10 purchases/downloads
  → Battery and accessory storage bins
  → Additional custom sizes available (2 per purchase)

• 20 purchases/downloads
  → RC controller mount
  → Additional custom sizes available (2 per purchase)

Print Settings

• Printer: FDM printer with a minimum 250 × 210 mm build area

• Material: PLA or PETG

• Layer Height: 0.20 mm

• Walls: 2-3 perimeters

• Infill: 15% or more

• Supports: Snug supports required for Arm files, see 3mf for how to set this up

Estimated Material Cost (using preconfigured 3mf file)

• ~345 g PLA

• Estimated filament cost: ~$8 (using a $20 spool)