I'd rather have the rear-view-mirror thing, since it would be within my easy field-of-view. I'd have to look down to see the empeg.

And to answer your question, as far as I know, no one has tried it. It would require converting the display signals of the V1 into RS-232 serial commands: I don't think it uses RS232 on that display extender. This could be do-able, but it would be a lot of work.