Lijsten Ender 3 Pro Mainboard Wiring . This series of guides will go through the process of upgrading a stock ender 3 pro with a duet maestro, from wiring, to firmware configuration, and basic tuning steps. The creality ender 3 offers a lot of unique perks for such a low price point. Later guides will go into more advanced feature upgrades like installing alternate fans, led lighting, and z probes like the bltouch. I recently installed a silent mainboard on my ender 3 pro (received the mainboard upgrade as a gift, and it really is a nice quality of life … Why is this an issue?