Guys, really interesting topic, and after being inspired by the guy with the soda can, and it being "beer o'clock" over here in Australia, I had to have a beer, so I could use the can! Took all of 5 minutes and sort of managed to keep the antenna in the right place in regards to the curve of the reflective surface. Tried it on the drone and found a vast improvement in the distance as well as the video quality. Would be real easy to make a balsa bracket, glued to the can, to support the top of the antenna.