He did his modeling in Autodesk’s free Fusion 360 CAD software. He then printed it out, and the box didn’t open. It took three revisions before the perfect key popped out of the printer.

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For those who choose to 3D print their own case, I recommend using FedorSosnin’s SiCK-68 tada68 ‘thing’ from Thingiverse. It is well-designed and the printing instructions are easy to follow.

Printed in PETG, a plastic commonly used in 3D printing, the key switches themselves use a leaf spring mechanism and lasted ‘over 350k presses in all cases’ during the testing phase.

It can be printed in 2 pieces (top and bottom) on a cr-10 or equivalent or 4 pieces on a bed that is 220×220 or above.” “It uses the Royal Kludge keyboard RK61 (both USB wired and Bluetooth.