Hi Leandro -
Thanks for sharing your project and workflow - it’s important work and I will be very interested to see what you discover.
A few thoughts / suggestions: a lot of work has gone into enhancing the new Segment Editor so it might try that. Also in both editors the GrowCut algorithm (Grow from seeds in the Segment Editor) could help, but if not it would help us to know if any of the automated tools help or if you really prefer manual methods.
Also as you do multiple cases you might find the CaseIterator useful for managing your workflow.
Best of luck,
Steve