I noticed in update 1.1.1 there was an addition of a placeholder variable [progress].
Quote from the change log 1.1.1 ...
Added [progress] placeholder variable to custom G-Code fields (example "M73 P[progress]" becomes "M73 P53" if build is 53% through total layers)
This placeholder variable only works under "Starting G-Code" and "Ending G-Code". Can this variable be added to the "Layer Change G-Code"?
This would be helpful if one wants to add a separate progress meter/screen/lcd/led to their machine that would be updated with the progress every time there is a layer change.