finished the frames, "Helling (slade)" and most of the stringers. For the new aft section i have to cut a second set of stringers.
I do use just plain "grbl". The cutter is from "Eleks maker".
The 15W Laser module is from "Aliexpress" (I'am not affiliated with or get any payment wahtsoever.) Search for "Blue Laser cut module 15W" or similar.
The is PWM modulated by Pin11 of the arduinio board.
On/Off is set by "m3" and "m4" grbl commands in the software. Speed is set with "F number" and the PWM is set with "S number".
I did setup the layers in the DXF drawings in a way that "dxf2gcode" takes it in as steering commands.
In the "gcode sender" you would want to set "$31=1" for the grbl firmware to get into laser mode.