Congrats on the first flight!
It really does pay to check everything a few times. When we say to check 3 times, its mostly because we’ve all checked 2 times and then had problems only to find we missed something 
On my first build, everything was perfect, except for one, pesky resistor. I has a 220Ω instead of the 220KΩ. It all came down to missing 1 color band. Id like to say thats a rookie mistake but I think I’ve made similar mistakes since 