Got an email back from Bob at EW.
Turns out the advance curve starts retarding as the rpm increases after max.
The digital version levels off at max advance and stays there. So I do want the Digital version
Apparently there is something to be screwed in clockwise to set the max RPM limit but what or where it is I haven't the faintest. The max rpm can be set as high as 13000+ rpm although I think the Hornet would grenade long before that. Of course the documentation says nothing about this.
Where is me magnifying glass?