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probably better to mimic this behaviour by creating 2 racks, each with the devices in the order you want, and then enable/disable them appropriately... not sure you'd want to be moving stuff around in real time if you didn't have to (my2c)
should be possible if you simulate the keystrokes for cutting/pasting with a suitable external. (before that you can select track/device with the api) seems like a device is always pasted before the selected device.