About this 3D model
Sparkfun sells these nice LED compatible button pads:http://www.sparkfun.com/commerce/product_info.php?products_id=7836They look good and they have a nice feel to them. Unfortunately when I purchased mine, the bezel to hold them was sold out. No problem. I made my own.I created the model in SketchUp and printed it on my Makerbot in PLA, so no raft was required.