How to replace the knobs on Decker

Replacing the knobs on your Decker is a straightforward process, but taking your time and following the correct steps will help you avoid damage and ensure a perfect fit and feel. This guide walks you through the entire process.

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Step 1: Prepare the Tools #

Before getting started, gather everything you need:

• Replacement knobs – Ensure they are 4mm fader-compatible.
• Knob removal tool – Included with the knob replacement kit.
  • If you don’t have the included tool, you can print one yourself.
    👉 Download knob removal tool from MakerWorld / Printables
• (Optional) Knob case – A case to store removed knobs, since you may want to reuse them in the future.
  • You can also print this one yourself!
    👉 Download knob case from MakerWorld / Printables

Make sure you’re working on a clean, flat surface with good lighting. A soft mat or towel under the unit can protect both Decker and the knobs from drops or scratches during the process.

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Step 2: Remove the Existing Knobs #

This part is all about patience and precision.

1. Slide all faders to the top – This gives you the most access and space for removal.
2. Start from one side – Work left to right (or right to left), one knob at a time.
3. Insert the tool – Position the knob removal tool under the edge of the knob. Slide it fully underneath until it feels secure.
4. Lift gently – Apply gentle upward force to the top of the tool, away from the knob. This will begin to lift the knob.
   • If it feels stuck, do not force it. Try inserting the tool from the opposite side of the knob.
   • Be mindful – knobs can pop off suddenly. Cup your hand around the knob to avoid it flying across the room.
5. After removal – Slide the fader down before proceeding to the next one.

Repeat until all the knobs are removed.

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Step 3: Mount the New Knobs #

Now for the satisfying part—installing the new knobs.

1. Move all faders back up to the top.
2. Prepare your new knobs – Confirm that they are 4mm fader-compatible.
   • These knobs fit snugly on the metal fader stems.
   • For detailed compatibility specs, refer to our knob compatibility guide.
3. Start from one side – Line up the knob with the fader stem (the metal stick).
4. Apply firm but gentle pressure from the top, centered directly over the stem.
   • Avoid pressing from an angle, as this can bend the metal or misalign the knob.
5. Special care for center knobs – If these are hard to press down you can support the back of the PCB with one finger to create counter-pressure and reduce stress on the board.
6. Check knob heights – Once all knobs are installed, inspect from the side.
   • If any knob sits lower than the others, use the removal tool to gently lift it until it’s level.

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Final Tips #

• Avoid using metal tools, which may scratch the surface or damage the PCB.
• Do not force any knob into place. If it feels wrong, double-check compatibility or alignment.
• Store removed knobs in the knob case (or another safe container)—you may want to reuse them in the future.

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If you run into any issues or want to share your custom builds with the community, feel free to reach out or tag us on social!

We also have a #showcase channel in our Discord to show off custom-builds, mods, and setups, so feel free to join and share yours!