I've never flown a helicopter yet. Still trying to feel comfortable with trimming it while secured to prevent take-off.

Problem - Up elevator simultaneously causes some right tilt of main rotor. The reverse is also true.... down elevator causes some left tilt of the main rotor. Does anyone know how to eliminate this? I haven't figured out a way to trim this out on the transmitter. Maybe there's an issue with control rod lengths?

Any ideas woould be appreciated. Thanks