Just installed the ableton script, and its working (almost) flawlessly. (I had to change the snapshot-buttons from "duration control" to "control toggle" in the MCC-app to make arming work.)
I've seen some controllers (ie. novation) that have the ability to move the 'Blue hand' between devices in the device-rack, so that you are able to control each device without having to use the mouse to select them.
Anyone know a way to make that happen with the current script?