All,
I finally got my Spiffie.org MPGuino working, and although it is not in an enclosure yet, here are some pics (Sorry for the poor quality phone camera):
I removed the polarization film and cut it up and rotated it to achieve the inverted effect.
This is where I mounted my buttons. It turned out very nice!
I hardwired it, I did not use the phone jack and flat wire. I did not like the wire coming out of the side, I want it to be as small as possible.
Now it is all about getting it calibrated and hoping it will help minimize the effects of the cold weather on my FE. This is a great project, and would recommend it to anyone who cannot afford a ScanGuage.