When going to put this back together the clips at the bottom of the unit did not want to go back into place. I found I had to clip off the clips with some high end wire cutters. The screws will hold it together anyway so they are redundant and you will be happier the next time you have to open it as it will be easier.
Also the first time you pry open the top of the unit as described you may bend a metal clip for the card slot. Be careful or you might destroy it. In my case it was just a bit bent and with electronics tweezers I was able to bend it back into shape and put it back in it's proper place. This is likely unavoidable especially the first time due to how tight the plastic and metal clips are.
Whatever you do be slow with the process. Trying to do it to fast will likely lead to problems. Thanks for the excellent instructions. They were quite helpful.