I actually just replied to the person suggesting kryoflux... I was able to recover most of my seeming corrupted disks using kryoflux and a bunch of different floppy drives... different drives were able to read different sectors, which lead me to be able to recover the entire image.
Also interesting that you used different drives to achieve that too, I wonder why different drives could read different sectors. Possibly the pickup coil of the read head was slightly different size maybe? Or the stepper motor aligns the head to slightly different positions of the track?
Yes. Kryoflux is pretty good at not saying a sector is good unless it actually is. I was able to mount almost all of the images I made this way, and haven't seen data corruption issues.
All of my floppies are either very old commercial software (that I could likely download from an abandonware site) or personal data that I backed up a long time ago.