I was thinking of digging out all my old Amiga disk's and making ADF's. Can the ADF utilities make image's of all disk's, even the "NDOS" ones?
Some can, some can't. Some old games use a very non-standard track format that no tool will be able to ADF. Supremacy is an example. For these I suggest using their WHDLoad installers to rip the disk image instead. Of course, you'll only be able to use WHDLoad to play it then.