It is a vector file and I ran it at 6 Ipm with two passes and air assist cutting 1/8" Birch Ply. I used that puzzle extension for inkscape and saved it as a DXF. You just need to create a page the size of the engraving and set how many pieces X&Y and the shape. You will just have to play with the settings until it looks like you want it to.
The gcode generator in inkscape would not generate the gcode properly because it used all arc commands. BodCad should be able to generate the gcode properly if you have a Post Processor for S commands. I did it in Kubotek KeyCreator with Z commands and used an encoder for the laser modulation on our Shapeoko.
I recommend using the standard grbl 9J because if there is any G00 commands in the file, the J-Tech grbl does not support them and it will travel from one place to the next at 6 IPM instead of a rapid move.
You can download the grbl 9J hex here: https://github.com/grbl/grbl
It's the Master Branch. Make sure you backup your grbl settings in the PicSender GRBL menu before flashing the new firmware so you can change/reload them again. The new firmware has default settings, so you will need to change them for your machine.