right thrust if you're stand behind the airplane

the reason you need right thrust is to counter the engine's torque,which
will tork to the left...so don't go putting right thrust in an electric.
mount the engine's mount a little bit off center to compesate, if you want
the spinner to be at center.
but i don't think the 4* has right thrust thou...

i sholve it all in there with foam(rx & battery). this way i can shift it later if i need to change
the CG. only thing i can hear rattle is the tank's clunk.
check for that sound after a hard nose over

balance low wing air planes inverted.

lateral balance to help the air plane track better
screwing a screw to the rear of fuselage.
tie a string to the screw and engine's shaft.
shift rx and battery if appliable.
add wight to the wing tip if required