Tuning E steps issue and firmware issue
Ah - I just loaded 20210114 and can duplicate the scrolling issue. I'll see if I can get a bug report put together on this.
In the meantime, I know 20210108 does not have this issue - as this is what I tested with.
On further investigation - it seems this was broken in 20210113 and later. Using a firmware earlier than this date will fix this issue for now until a code fix can be implemented.
Let me know if that link works.
Do you have any plans to support other boards? I was thinking about going to a Duet 2 WiFi and running a duel extruder setup.