I recently made a swappable hot end which can be found here https://www.thingiverse.com/thing:3547740 on which this laser engraver can be placed. I intentionally placed the female version of the d sub connector at the tool side because the mixed male version fits a regular female one and not vice versa.
A major advantage I have encountered is that you don't have to connect the laser directly to the control board, or worse, with a switch. You can just use the schematics as shown in the swappable hot end and connect the laser to the part fan and the fan of the laser to the hot end fan. In this way the fan is constantly spinning which keeps the engraver colder.
Please consider buying me a coffee if you liked it or helped you :) http://ko-fi.com/properprinting/
I took for granted that I use these m3 brass inserts so I forgot to upload a version with smaller holes in which the screws for mounting the sub D connector can be screwed in directly. So, print out this version if you don't have these inserts ;)
eSun Carbon fiber reinforced nylon
I have fallen in love with this material but it might as well work with any other material.
To prevent the printer going into error state you can connect a 100k resistor at the thermistor connections. The printer will measure 25°C.
If you want to add this to your printer you need the quick tool change which I have designed at the start of this year: https://www.thingiverse.com/thing:3369444
I have made a video about this upgrade and it shows how I managed to laser engrave a 3D printed part. I have added the cross to the files which I have used in the video to determine the tool center point of the engraver relative to the 3D printer nozzle.