well, I came up with a workaround if someone is interested, but still, would like to hear how other people would go about doing it! so what I did was: 1. use mask pen with radial sym 2. extract the resulting mask 3. polish by features to clean any jagged edges 4. zremesh by half a few times - turn on keep polygroups 5.…
I don't know of any way to do this automatically. Workaround: make sure the start and end points of the curves match up better than in your screenshot, then use ZModeler to bridge between the segments. Just keep radial symmetry activated to bridge all holes at once (Bridge -> Two Holes target).