Picture is worth a 1000 words, so I started with pictures and will add notes as required. Started with a stepper motor from and Ooold 5 1/4" floppy drive - those steppers are big and heavy - good for generators.
The only thing I wanted from the CD Rom for now is the spindle to fit the CD Rom disk opening and be able to attach it to the motor.
Drilling for the motor shaft size.
Using the CD Rom cover to mount the stepper motor - generator to it.
shown mounted with 2 self-taping screws.
Applying crazy glue to a bad CD-Rom to attach the CD holder to it. Make sure the glue is dry before going to next step!
Now gluing the spindle (cd holder) to the generator.
Generator and CD mounted.
... in progress