For those that have not seen the instructional file assembled by Bill Grosse, I strongly suggest that you visit
http://psrtutorial.com/Resources/Articles/floppyrepair.html and read the detailed instructions on how to replace your keyboard's floppy drive. Over the past two years, I have replaced more than a dozen for individuals residing in the mid-Atlantic region of the U.S.. It's not at all difficult, but Bill's detailed instructions make it much easier for those who have never seen the inner workings of a keyboard.
Congratulations Bill on a magnificent job,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)