I run a K40 with Cohesion3D Mini with GRBL 1.1 and ofc LightBurn.
I swapped from Smoothieboard to GRBL with great improvment of speed and reliability.
Suffer tho from z-axis and airassist doesnt run anymore.
Now I manually move the bed which will be hard after upgrade to 700x400 and manually plug or unplug the airassist.
Any clue where to start?