https://www.instructables.com/id/HacKeyboard-a-mechanical-keyboard-built-from-scrat/ https://68keys.io/ https://www.makeuseof.com/tag/build-custom-mechanical-keyboard/
To try different switch types (colors): https://es.aliexpress.com/store/product/9-Cherry-MX-Switches-Keyboard-Tester-Kit-Clear-Keycaps-Sampler-PCB-Mechanical-Keyboard-Translucent-Keycaps-Testing/2131278_32834771163.html https://deskthority.net/workshop-f7/building-a-custom-keyboard-from-the-ground-up-t5761.html https://deskthority.net/workshop-f7/brownfox-step-by-step-t6050.html http://blog.komar.be/how-to-make-a-keyboard-the-matrix/