Hi Ken,
I'd like to say the EFIS is wireless, but it does employ serial data streams to keep the wiring bulk to a minimum. I am guessing the couple B models I am comverting now will lose about 25 lbs of wiring, and I'm not kidding!
Admittedly a tough place to take pictures, but I tried to snap a few to give you a feel for the "amount of yellow" visible as you look up into the EFIS installation from below. Don't show these to your mechanic unless you plan to buy it!
Jim
Wiring behind Pilot Panel.jpg
Looking up into the Pilot Side (365,306 bytes)
Wiring behind Copilot Panel.jpg
Looking up into CoPilot Side (346,698 bytes)