Bump!
Nobody answered JohnInOttawa's question so I thought I'd give it a bump because I have the same question:
I also presume, since cura can't handle 0.6 AA yet, the gcode to program an AA hardcore to 0.6 would just screw stuff up
Is that correct?
Maybe it will be a moot point when Cura supports the CC hot end?
Also, I just installed Bondtech QR extruders and printed ColorFabb XT-CF20 with a .6 mm ruby nozzle with line width set to .15 mm, The results are good but I think I am seeing just a bit of over-extrusion. Anyone else seeing that?