To continue on the swappable hot end I have designed two weeks ago, I created a holder for a laser engraver which fits this system. Read more about that thing here: https://properprinting.pro/swappable-hot-end-for-creality-cr-10/
This means that with this upgrade you can add a laser engraver without having to add an extra cable from the main board or create something with a switch!
I have created a video in which I explain how I add the laser engraver tot his system. I found out that it is possible to laser engrave carbon fiber reinforced nylon filament so the second part of this video shows what you need to do to make this happen. As always, feel free to leave a comment or contact me if you have any questions, suggestions or remarks. Have fun watching!