I started building and flying race copters in fall 2017 because I haven't trained my motion-memory a lot before... It's addictive so in 2019 I own an entire fleet of race quads: Micro Brushless 1S (UK65, TinyHawk), two 3-Inch, and several 5-Inch. I built most copters by myself with a few exceptions - I like tinkering it together!