My solution (which includes some steps described ITA) after struggling for while: 1) get rid of multiple users 2) free up a lot of space 3) run ForeverGone. #1

My solution (which includes some steps described ITA) after struggling for while: 1) get rid of multiple users 2) free up a lot of space 3) run ForeverGone. #1 was a step backwards, but so was horrible performance. Now things are running smoothly.