MX ErgoStack

The Accessibility Need

Typing on a standard keyboard for hours can lead to wrist extension, joint fatigue, and discomfort, especially for users dealing with carpal tunnel syndrome or limited mobility. A static wrist rest doesn't work for everyone, as different body types, arm lengths, and desk setups require personalized support. We need a dynamic solution that adapts to the user, not the other way around.

The Solution: MX ErgoStack

The ErgoStack is a fully modular, non-destructive wrist support system. It tracks your natural movements and provides active relief without locking your hands in a rigid posture.

• 100% Non-Destructive: Seamlessly hugs the bottom profile of your MX Keys. No screws, no drilling, and no voided warranties.

• Smart Split Design: The main dock is split into two halves, making it incredibly easy to print on any standard 3D printer bed.

• Endless Adjustability: Choose from 6 different Pivot Arm lengths (ranging from 45mm to 95mm) to find your perfect reach.

• Stackable Height: Mix and match interlocking risers (8mm, 16mm) to dial in your ideal elevation.

• Dynamic 360° Rotation: The fluid rotary joints adapt dynamically to your typing posture.

Bill of Materials (BOM)

The system is designed around satisfying magnetic snap-fits, but remains fully accessible even if you don't want to buy hardware.

• Option A (Magnetic): 10x3mm neodymium magnets. Depending on your configuration, here is the exact breakdown per component:

  • Base Split Union: 4 magnets (to snap the two dock halves together)

  • Base Mount Slots: 6 magnets (to populate the preset attachment points on the dock)

  • Pivot Arm: 2 magnets per arm

  • Rotary Platform: 3 magnets per platform

  • Height Spacers: 4 magnets per spacer

  • Top Comfort Pad: 2 magnets per pad

• Option B (Hardware-Free): Don't have magnets? Use the included printable friction-fit connection pins for a 100% printed assembly. Note: The printable pins are modeled at 10x6mm, perfectly replacing the footprint of two stacked 3mm magnets to lock the modules together securely.

Assembly Instructions

1. Assemble the Dock Bring the left and right halves of the main dock together. Let the neodymium magnets pull them into a satisfying snap (or firmly press the 10x6mm printed pins into the slots for a hardware-free build).

2. Attach to the Keyboard Slide the assembled dock under the front edge of your Logitech MX Keys. The non-destructive design will seamlessly hug the bottom profile without interfering with the keyboard's rubber feet.

3. Mount the Pivot Arm Select your preferred Pivot Arm length (from 45mm to 95mm) to match your reach, and snap it into your desired position on the base.

4. Stack and Swivel Build your ideal ergonomic elevation by stacking the Rotary Platform and any required Risers onto the arm. Finally, cap it off with the Comfort Pad. The system is now ready to smoothly track your natural wrist movements! 

Materials & Customization

Accessibility means giving users options. You can choose how to finish the top comfort pad:

1. The TPU Route: Print the Top Pad in flexible TPU for integrated, seamless cushioning.

2. The Foam Route: Print the pad in a rigid filament (like PETG or PLA) and apply an adhesive EVA foam or neoprene strip for a customized, easily replaceable soft touch.