I saw Rick flying it about a month or so ago with another club mate who also has one with the same gear mod and they were flying and landing perfectly. They are a good size as well when you see it in the flesh, was interesting that a lot of the equipment (fuel tank, header, landing gear) that I have with my Predator 1.8 is what is included with the viper.

https://cimg8.ibsrv.net/gimg/www.rcu...e7641387ad.jpg
Four Vipers flew on the weekend. Two old hands and two maidens.