Hawkeye Firefly makes many nice cameras.
Seems to be affiliated with Banggood.
You want to move away from the old style body. Those flimsy shells with a fist full of tiny screws are a nightmare to take apart.
To be honest I don't bother trying to read a 'wall of text' post. You need to break it down into paragraphs.
The original X5 is old tech, things have moved on since that. If you want Syma go for a newer one.
A few tips here.
Feature rich for sure, but the independant reviews I looked at, even with the 3 axis gimbal, the video wasn't very smooth and jello was evident....
You used a multimeter?
You say 'properly' does that mean it still works somewhat?
What RX do you have?
If that prop adapter raises the height on all your motors then it may be the wrong size. Try drilling it out a tad.
With my Bugs 2 the recording needs to be stopped by pressing the button marked with a camera icon (which also starts the recording) , before...
Well this comes close to your budget, read the reviews and watch some vids on YouTube....
You got the arrow pointed forward?
Separate names with a comma.