Upgraded my flashforge dreamer with marlin. Using

GitHub

GitHub - moonglow/FlashForge_Marlin: :shark: Marlin firmware for FlashForge Dreamer/Dreamer NX/Inventor, Bosch Dremel 3D20 3D, PowerSpec Ultra 3D and Monoprice Inventor 1

:shark: Marlin firmware for FlashForge Dreamer/Dreamer NX/Inventor, Bosch Dremel 3D20 3D, PowerSpec Ultra 3D and Monoprice Inventor 1 - moonglow/Fl...

To use the cura slicer I added profile

GitHub

GitHub - tracedgod/FlashForge-Dreamer-Cura-Definitions: Ultimaker Cura Profile Definitions for use of the FlashForge Dreamer 3D Printer

Ultimaker Cura Profile Definitions for use of the FlashForge Dreamer 3D Printer - tracedgod/FlashForge-Dreamer-Cura-Definitions

I've adjusted the definition so that the dual extruders can be used on the whole print bed. Next is to zero each extruder.