Im in the same situation: Control of Air Assist with Atomstack X20 - LightBurn Hardware Compatibility [OFFICIAL] - LightBurn Software Forum. What firmware you have on your X20? Did you already update. Looks to be the X7, S10, A10 firmware has this working? Since the ESP in not easy to mess up (as long you have an backup or working firmware) i may try this versions. Also building an Custom version from MKS source is may be an option. Not sure what is really changed at the Atomstack controllers. The display is definitely connecte differently. Software & User Guide Download - Atomstack.com – AtomStack