LAOS Laser

Apparently we use a very old version of GRBL in the LAOS firmware. Can we find and use a proper, more up to date version?
GRBL website:
http://bengler.no/grbl
Regular, Arduino focused version:
https://github.com/grbl/grbl

Maybe the Smoothieboard fork is interesting?
https://github.com/Smoothieware/Smoothieware/

Or maybe the Lasersaur firmware?
https://github.com/stefanix/LasaurApp
This fork seems more recent:
https://github.com/art103/LasaurApp/