I’ve been testing Corsair’s new $229.99 K70 Max mechanical keyboard for the last few days — its first to use magnetic Hall effect sensors to register keypresses, allowing for new features like the ability to customize how far you have to press a key before it registers a keypress. The company is branding the switches as “Corsair MGX” to distinguish them from its existing optical mechanical OPX switches and keyboards with standard mechanical Cherry MX switches. Alongside it, the…