> Are the machines leased or owned? Because if they are owned outright (which is implied by the fast that ifixit was able to buy a used one to work on) then wholesale replacement of the control electronics would just void any warranty but would not be able to be hit with any sort of firmwarm hack copyright claim, assuming any new software writted for the control logic was clean-sheet engineered and not reversed from the Taylor control system.

But Taylor (presumably) won't repair them if they have modified boards and it's a breech of contract for them to hire anyone else to repair them.