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I kinda thought a scandi grind was a zero edge as how it didn't have a secondary bevel? So I am not sure what a true "zero" edge is. Would that be a full height flat grind with no secondary bevel? Like a triangle?

Yes. a true scandi has a zero-edge. To mantain that edge properly, the entire bevel needs to be worked to keep the excact same geometrie..

and yes..
a true zero edge is like a triangle.. (on a full flat grind that is)