I have a 500 with orbiter V2, mosquito magnum. I followed the guide for the firmware configurations and on first print, it is severely underextruding. Manually toggling extrude seems fine. I want to make sure I have everything configured correctly before I go brute forcing things in tuning.
an update: increasing the flow in slicer is not making much difference, but the extruder motor is extremely hot only a few minutes into printing a test cube. Also E-steps seem to be about right.