Bomb Busters Cable Holders – Letter Inserts, No MMU/AMS Required

Bomb Busters Cable Holders – Letter Inserts

These custom cable holders are designed for Bomb Busters and make it much easier to identify and communicate which cable should be cut.

Instead of:

“I'm cutting your fourth cable from the right... no, wait, the other one...”

you can simply say:

“I'm cutting cable F.” 💣

The holders also provide a more upright and privacy-friendly viewing angle, making it harder for neighboring players to get a glimpse of the cables on your holder.

Two-Color Printing Without MMU or AMS

The holders are designed to achieve a clean two-color look without requiring an MMU or AMS.

The holder itself is printed in one color, while the letters A–O are printed separately in a second color and pressed into the corresponding openings afterwards.

The letters are designed as a press fit. No glue is required. On my Prusa CORE One+, they click securely into place using a flat pair of pliers and hold absolutely bomb-proof. 💣

What to Print

Each complete holder consists of:

• 1× Base plate

• 1× Rear wall

• 1× complete letter set A–O

Each letter set contains 2× every letter from A to O, for a total of 30 letter inserts.

Each holder requires two of every letter because each cable position is identified on both sides of the holder.

Bomb Busters can be played with 2–5 players, so you need:

• 2 players: 2 holders → 1× letter print

• 3 players: 3 holders → 2× letter prints

• 4 players: 4 holders → 2× letter prints

• 5 players: 5 holders → 3× letter prints

On my Prusa CORE One+, two complete letter sets fit on one build plate. I printed a complete set of 5 holders for my own game.

Design & Inspiration

This model is a remix combining ideas and adapted geometry from two existing Bomb Busters designs.

1. Bomb Busters Insert, Organizer, and Drop-In Replacement

The concept of using letters to identify individual cables was inspired by this design:

Bomb Busters Insert, Organizer, and Drop-In Replacement
https://www.printables.com/model/1190925-bomb-busters-insert-organizer-and-drop-in-replacem

2. Dodgy Bomb Busters Segregated Wire Console Back

The rear wall geometry was adapted from this design. In this remix, the angle at which the rear wall meets the base plate was modified to suit the newly designed base plate:

Dodgy Bomb Busters Segregated Wire Console Back
https://www.printables.com/model/1336663-dodgy-bomb-busters-segregated-wire-console-back-re

The base plate was newly designed, and the A–O letter inserts were newly modeled as separate press-fit parts to enable clean two-color printing on a standard single-extruder printer.

Many thanks to the original designers for sharing their work and providing the inspiration for this project!

Assembly

Each holder consists of three components:

1. Base plate

2. Rear wall

3. A–O letter set

The rear wall simply slots into the base plate and can be removed again. This allows the holders to be disassembled and stored conveniently in the original Bomb Busters box.

After printing, simply press the letters into the corresponding openings using a flat pair of pliers.

No glue is required.

Printing

The model was printed and tested on a Prusa CORE One+.

Base Plate

• Material: PETG

• Nozzle: 0.40 mm

• Layer height: 0.15 mm

• Infill: 15% Gyroid

• Brim: None

• Print time: approx. 2 h 46 min

• Filament: approx. 54 g

Rear Wall

• Material: PETG

• Nozzle: 0.40 mm

• Layer height: 0.15 mm

• Infill: 15% Gyroid

• Brim: None

• Print time: approx. 31 min

• Filament: approx. 13 g

Letter Set A–O

The letter file contains two complete sets of A–O, i.e. 60 individual letter inserts in total.

• Material: PETG

• Nozzle: 0.40 mm

• Layer height: 0.15 mm

• Infill: 15% Gyroid

• Brim: None

• Print time: approx. 27 min

• Filament: approx. 6 g

The letters can be printed in any contrasting color.

Important Print Tip – Base Plate Warping

Allow the build plate to cool completely before removing the base plate.

Removing the base plate while the build plate is still very warm can cause slight warping, resulting in a small upward curve in the center.

Once the rear wall is inserted, the base plate is straightened again and the assembled holder sits correctly.

The rear wall can still be removed afterwards, so the holders can be disassembled for storage in the original game box.

I originally printed the base without a brim. Waiting until the build plate had cooled completely was sufficient to avoid the issue in my prints. A brim may further reduce the risk of warping.

Final Result

A sturdier and more upright cable holder that makes communication during the game much easier — with a clean two-color appearance without requiring an MMU or AMS.

Happy bombing! 💣