yes, that is true. Ideally should be on other side. I knowingly do so at my own risk. Don't remember why I did it like that originally, been a couple years but it made sense at the time. I might look into it again.
The gyro goes on top to protect the receiver and for better wiring. It's worth as much as the gyro and mounting it on the side exposes it to a crash more than the gyro on the top. Plus the Rx has the servo inputs on the top of the case and makes wiring easier with it inside. My last crash landed on the left side and the Rx would of been hit directly.
Flying objects sometimes don't.
Mini Titan, Raptor 50V2, Protos and a Genius
FB, FBL, Plastic, Carbon Fiber, Nitro and Electric, one good time