I do believe Tinstaafl is a genius - this I believe is how the VSI & Altitude tape - side-by-side orientation is supposed to work - again, I was told this by the flight deck inventor of this particular EADI configuration - he said this is how his flight deck group defined this to Honeywell & Collins & whoever else builds these damn things, but does not think many pilots are aware of this Modus O..
I agree an esoteric exercise ..