New video: Commodore 1541 Disk Drive Differences
The 1541 was the ubiquitous floppy disk drive for the C64. The different drive revisions look very similar, but on the inside there are some significant differences. Not only did they use two different manufacturers for the mechanisms. But a small difference means you can't swap any two mechs around into other drive variants.
https://youtu.be/rOddAgV6eHU
https://makertube.net/w/a3USCY7i7kreL8j3vtPFns
