Erroneously made Japanese number 4 key cap in GMK Katakana Round 1, which happens to be a mirror image of the correct character 「四」

Corsair K65 Plus Wireless GMK Red Samurai Moondrop Tactile Tessence

All that sweat and money paid off. I will use it wisely. Tokyo 60 GMK Serenity Gateron Oil KIng

I saw the online configurator that lets you do this on the Shift V1, where it spits out a compiled firmware file to flash. The V2 doesn't seem to have this function in the Windows configurator, though. I can't imagine the answer here is "you're going to have to manually write the hex for every key in QMK, compile it, and flash that".

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If I want some hot-swap socket for replacement, where I can buy to ensure it fits this PCBA?