75-percent gasket-mounted aluminum board from KBDfans with a hotswap PCB and QMK/VIA support. The V3 revision switches from a top-mount to a gasket mount for a softer, more forgiving typing feel; one of the most-recommended 75% entry points for builders who want a function row without moving to a TKL.
Every custom-keyboard buyer's guide since the mid-2010s opens with the same four-term vocabulary — 60%, 65%, 75%, TKL — as though it always existed. It didn't. One open-source PCB out of a geekhack thread is most of the reason that taxonomy exists at all.
Most first custom keyboards aren't built from loose parts and aren't bought finished — they're a barebones kit, a case-plate-PCB bundle that leaves the rest of the decision to the buyer. Here's how to make that decision without guessing.
A builder who has lubed switches and tuned stabilizers and chosen a keycap profile and still cannot place why their next board feels different from their last one is usually meeting the mount style. The plate's relationship to the case is the half of the typing feel that nobody discusses on a sound test.
Two years ago a custom-board recommendation defaulted to 65% with a polite note about 75% as the next step up. The KBD75 v3's staying power as a default recommendation, the QK75, and a crowded mid-tier have flipped that order. 75% is now the layout customs reach for first.
KBD75 v3 appears in editor-curated build sheets.