Hi Guys,
I just got my digital switch with built in regulator set at 5.6v from Duralite. All I can tell you is WOW. It weighs less than 0.5oz (15 grams). Has a light on it that shows you the charge of the battery also. Has a safety feature that won't go on or off in vibration. If you want to turn it on, you would have to hold the button until an orange light goes on and then within a second release and push the button again until the green light goes on. It's just incredible how light it is. I can take pics if any one interested to see this thing. It will be installed on my QQ-Yak 102" It's rated at 2-3amp so you can't use it for big planes but for ignition is just a perfect application. Connect your 2 cell Li-Io battery and that's it.
Here's the link
http://www.duralitebatteries.com/accessories.html#Dash this is the part number
#80401 - Digital Switch