I am slowly getting the RV4 panel whipped into shape.
I am not a fan of electronic flight instrument
as you can tell. Especially most of the older
systems that show only one parameter at a time.
Both the RMI and the AV8 are now out of biz.
When I look at the panel I would like to see
what I need to see without pushing a lot of buttons.
Also the older LCD's are hard to read in regular lighting
let alone bright sunlight

The Auto Meter Air/Fuel Ratio meter is out and out useless.
It uses a narrow band cheap O2 sensor that is either
rich or lean. How rich or lean who knows.

It oscillates between rich and lean and you are supposed
to understand that if it is 50 50 you have stoichiometric.
14.7:1. If you are tuning Tracy's ECx that is totally
unacceptable. You need numbers that tell you exactly
what the mixture is.

Does anybody have a wide band mixture monitor?
If so tell us how well it works.
I am now in the market for one.

Paul Lamar