* better frame
** expensive 150$ http://www.minihquad.com/frames/blackout-mini-h-quad/
** cheap 20$ -40$*** fiber glass http://www.banggood.com/ZMR250-H250-250mm-Fiberglass-Mini-Quadcopter-Multicopter-Frame-Kit-p-933189.html*** carbon http://www.banggood.com/H250-ZMR250-250mm-Carbon-Fiber-Mini-Quadcopter-Multicopter-Frame-Kit-p-933185.html
* Better FPV antennas, stock are shitty with Skyzone kit (according to comments on HK)