I bought one of the JL1 lasers after seeing it described here in these very forums:
I mucked up the firmware with a botched upgrade (my fault!), and had to figure out a different way to put GRBL back on it.
Before I messed up the firmware, there was a red cross laser pointer that lit up (it was adjusted poorly but was adjustable and I had it working ‘well enough’ for framing or parts placement.)
After getting that machine running again, I can’t figure out with GRBL how to energize that LED pointer.
I wonder if something like that would be usable for the jackpot board when used with a laser. Use one of the extra IO to power the red dot/ red cross pointer and have control over it.
EDIT TO ADD: I am considering the jackpot as an upgrade for that JL-1 depending on how FluidNC works out with lasers…