It is Linux, and it can be 'accessed' from any system.

If you follow what I have done so far, you would be able to undo it, or would at least until FSL tries to roll out an update that hoses your machine. The probably won't but they *could* detect I've been in the system and lock me (or anyone else) out of their software.

What I am intending to do and I'm thinking it will take 1-2 months before I'm done is that I will start with a fresh microcontroller ($50-60), and use the existing addon/cape board. If you ever want to go back to the FSL one you swap the microcontroller again and you are back to the FSL software. My code will use standard gcode as input that you can generate/upload with any tool you desire. Right now it is in theory, hopefully be this weekend I'll have some practice