Step 1: Removing the Outer Enclosure
The first step is perhaps the trickiest. What you're looking to do here is dislodge the bottom cover (the one without the rubber circle) from the rest of the unit. This is made difficult because there are six plastic tabs inside the unit which hold it down. One method you might use would be to life up the cover on the back of the unit just enough to slide in some flat, sturdy object. Don't try to do this from the front because those tabs are not springy and use a sliding interlock mechanism. The three tabs at the back of the unit are about 1 inch in and spread evenly from left to right (use the pictures to help guide you). Take your time and go slow. In theory, you should be able to remove this without breaking anything if you work slow and take your time. I actually ended up just pulling on the back corner until one of the springy tabs snapped. From there I was able to dislodge the rest safely. If you do break something, don't panic, as the cover is purely aesthetic and not necessary for function. You've now completed the most difficult part of the disassembly.