This is Sincoders link 
Oh beat me to it @Leylo1971! Do you have to pay again after firmware upgrade? Last question as hijacking thread. Sorry!
Iām sure itās come down in price also, Iām sure he only charged 30.
Also, when heās doing it, keep an eye on whatās going on, when your pc is in remote, the files he uses are useful if you ever update f/w (although I donāt know which) so you can re flash
Air 2S is definitely better in the wind but the Mini 3 pro does pretty well. Remember if you intend to fly a drone heavier than 250g you will need an A2 CFC qualification and it is also more restrictive on where you can fly.
My suggestion would be the Air2S, itās much more stable in higher winds than the Mini 3 Pro. I live on the East Coast and know something about the likelihood of strong winds during your trip. Sure, the rules will let you get in to more places with the sub-250g Mini 3, but that wonāt help you if the wind makes it impossible to fly with any level of confidence. Thatās just my take on it.
You donāt āneedā an A2 c of c, it just helps you fly in more places, and closer to people. I have one but I didnāt need it, could have just flown in A3 if Iād of wantedš
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Fair point but not many would want an Air 2S and only fly in A3 I donāt think. I wouldnāt want an overseas visitor to be caught out