Thanks for the info.
I'm mostly just curious at this point - I don't have enough data to predict the likely hood of the issue occurring.
We do know what the bug is in mach - once the fix is released, this becomes a moot point as it won't happen anymore.
I'm afraid that you seem to be stuck until Brian gives us a fixed Mach rev.
Brian does have a fix for the PeriodicScript bug already - I've tested it.
I've asked Brian if he would release a dev rev with the MDI vs gcode and periodic script fixes.
Now all we can do is wait.
Dave