I'm not into this kind of "mod" myself, but some other members might be interested in a flip-key. Pretty cool someone put on of these together though. I remember seeing it a while back on some thread as well as in a video.
Link: http://www.ebay.com/itm/361535184424?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Video I found of it in action:
Link: http://www.ebay.com/itm/361535184424?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Video I found of it in action: