I installed an Icom A200, which I bought heavily discounted from AS&S into the aircraft that I built. Worked a treat, too. Far better than the Micro-Air in my current permit a/c.
I installed a two position toggle switch just in front of the throttle quadrant, toggle up and the box would cycle through the memory. Toggle down and it would flip-flop from s/byto active. Very Gucci!
Stik