DrawBridge aka Arduino Amiga Floppy Disk Reader/Writer
Open Source and Free! - by RobSmithDev
Installing your DrawBridge PCB
It's actually really easy, unscrew the screw in the bottom, slide the case apart, swap out the board with the new one and put it back together.
However, a video is much simpler to follow:
Notes:
Closing the Lid: If you have difficulty sliding the lid closed, then ensure the eject button is in the hole in the lid, and just carefully clip the case together. It doesn't need to be slid in.