Idea-just spitballin'

[Anton]

And so we know the scribe's were right handed - no sign of wet ink being brushed by their cuffs.

I have been doubting the point that the scribe was right handed. Speaking in terms of the curve-line system, the lines are always at an angle counter-clockwise. That would be natural for a left-handed person, but what does that mean for a right-handed one? Possibly, alignment to some diagonal macro-grid? Why diagonal?

As for the mirror, that was one of the first things I tried. I'm sure that's true for almost any Voynich reader