Hi ,
A few days a go i tried to print supports ,in one of my models ,in meshmixer and really that software create very useful supports ,u can configure density and other features but when i export to print un cura , The program (Cura) interprets these supports as if they were part of my modeling and can't detatch when the print finished.
I prefer print in parts and later stick with a combination of your waste plastics (of other prints) and acetone. For sharp edges i preffer use "grid" support in cura and if i print soft surfaces i use "lines" support and u can configure density supports too.
Sorry about my english , i try to explain.