I have no idea what the settings are in High Quality Print but you also need your fans at 100%. This is sort of a guess but given the small size of the overhangs I am not sure that keep changing the print speed is going to help. Every time you do that you will get a change in pressure in the feeding system which will lead to short bursts of under and over extrusion. Personally I would go as slow as you need to get the finish. Sure try 30mm/s but be prepared to go to 20mm/s, which I think will remove any jerk too.
The default quickprint high quality settings are not the best for dealing with overhangs. To get better results may I suggest you start from the "normal" quality in quickprint (layer height will be 0.1). Then switch to full settings and click yes when it asks if you want to carry over the settings.
Then you need to lower the print speed.
Go in the "Advanced" tab and set the infill speed and inner shell speed to 40 and the outer shell speed to 30.
These changes alone will yield much much better overhangs.
For an even better performance you could do infill 40, inner shell 30, outer shell 25.
The slower you go, the more you can lower the print temperature. So if you go slow you can also try to reduce the temperature from 210 to say 200-205. This also helps with the overhangs.
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