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Romeo 40% Kit

(1 customer review)


Build your very own custom 40% keyboard from scratch!

Easy to solder, uses only through-hole components.

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  • Soldering

    If you feel a bit uncomfortable soldering the USB-C socket, we're happy to do it for you.

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Romeo 40% Staggered Through-Hole Keyboard Kit

Designed by Bryan a.k.a. coseyfannitutti of

Build your very own compact custom keyboard from scratch!

  • Staggered 40% layout
  • Easy to solder, uses only through-hole components
  • The only slightly tricky part to solder is the USB-C connector. If you feel a bit unsure, I can solder it for you for a small extra.
  • Includes a FR4 switch plate
  • Lead-free tinned finish, black/white solder mask

You can download the build guide here.

Kit includes

  • Main PCB
  • FR4 switch plate
  • Bottom plate
  • All electronic components
  • Controller flashed with USBaspLoader bootloader
  • Brass standoffs and screws
  • Acrylic cover

Other required parts not included in the kit:

  • 41-44x Cherry MX-compatible switches (depending on layout)
  • 1x 6.25u + 1-2x 2u OR 3-4x 2u stabilizers (depending on layout)

Optional parts available as add-ons:

  • Switch plate foam and case foam to improve feel and sound
Weight 0.26 kg

Black, White

1 review for Romeo 40% Kit

  1. Tix Richard (verified owner)

    This was my first order from 42keebs and it did not disappoint. The cutting quality, materials and packaging are all top-notch. The build is easy and intuitive. Was super easy to solder. Flashing was a bit tricky because the flash-guide docs were gone from coseyfannitutti’s github repo, but wasn’t hard to do with QMK+avr.

    Build tips:

    Make sure to add both optional foam pads (plate + case) because the standoffs are provided for that thickness.

    Check the alignment of your shift and caps-lock switches for the proper position, I managed to mess mine up and had to desolder.

    Went with the split space layout and it works nice. Great entry point to the 40% world on a budget. Added Gateron blues because that is what I had around. Sound is fine despite being a caseless design.

    All in all very satisfied with both the kit and the store, keep up the good work!

Only logged in customers who have purchased this product may leave a review.

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