The floppy drives in Amigas that have many miles on them go bad regularly. I've had to replace them in 2 1200's a 4000 2 3000's and a 2000. If your good disk read consistantly, then maybe you did just get unluck with a stack of bad disks. If on the other hand even the "good" disk don't load all the time, then it may be time look for a good replacement floppy drive. Someone or some shop over the internet is probably going to be your source for a replacement if needed.
And welcome aboard!
Plaz
