You have to take the opportunity, been so little here lately. Cant help with the software, the helix shows the outer loop.. Always a sign you got nice and deep, it does appear smooth, a little too much perhaps I can't help but feel you have removed a bit of detail particularly on the inner edge of the ring where there are knots of gas. A little noise can also suggest detail. As you have the files you can be more the judge.
Good to see some images from Melbourne.
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