You should see what I had to do to install a different floppy drive in A1000, I had to drill 4 screw holes, which did not lineup properly, so I had to enlarge them. And then I had to make a custom eject button, that did no work that well. I may have to redo that some other time.
Yeah, I replaced the stock drive inside an A500 with a high-density drive, which had an extra circuit board on the back to convert it to Amiga mode (Power XL HD Floppy).
So I had to cut the RF shield to accomodate the extra long floppy. Then of course the eject button on the new drive is a different place, so I had to modify the Amiga's case. Also the eject button on the original drive was not long enough, so I had to do some "plastic welding" and create a new, long button from scraps of beige plastic from an old 486 laptop.
The end result looks good, though.