no-one got torque wire UC? simply use 8 guage wire and once at the plane bend 90 degrees to the legs, then after 3-4" bend inwards and hard mount, use clamps to hold the level part. the wire on this flat part will twist allowing the legs to spring. light and works great.

colours arn't the way for top/bottom vision, you'll recognize geometric shapes before colour and at a greater distance. large circles on the bottom normally do the trick. also make sure you're colours are opposite ends of the grey scale for better vision far out and in low light.