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Glad to here it!
What transmitter were you using?
Futaba is a great choice for a replacement!
Sounds great keep us posted.
Cool glad you figured it out.
What drone are you flying?
Maybe try this one- HERE
You need to go into the radio can reverse your channels and in some cases change your end points.
Look at - http://ardupilot.org/
What drone do you have?
EDF fans will work but draw to many amps for any real advantage.
What's your budget?
Bad soldering? Can you post some pics?
It is but the newer process and cores make that old technology.
DJI Spark is very good I agree!
Yes you can.
Here is the manual- https://www.protocolny.com/instruction_manuals/rc/6182-7CA-Galileo-Stealth-AP-IM.pdf