VisualSeek is cool but since my unit is a "slave" unit in my HU setup the knob is a visual seeker instead of a volume knob.

Hmm...this'll probably work better with VisualSeek mapped to a long press of the visual button on the remote. Could one configure the next/previous track buttons on the remote to switch the visuals at that point?
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It seemed like a good idea at the time.