AGO standard?

 

 The only AGO standard document I could find on the internet is the one from Wicks.  It has this diagram on it.  

I built the instrument based on 29 1/2" to the top of the second keyboard.  Sitting down at it, only a midget would be able to fit on an instrument with this measurement.  As a result, I had to add some 3" stilts to the legs of the build.  It's a bit of a happy accident, these make the instrument more stable, and looks better.

But if you're building a console, I'd recommend 30 1/2" to the top of the BOTTOM keyboard as the standard.