If the box is semi-transparent you are all set. Just peer inside and ascertain the condition of the tiny hamster within. If the mast was bent he is probably exhausted

motor reverse function should just require a DPDT switch embedded somewhere? Well a DPDT relay since its being triggered by a boot /shutdown command from the radio ? Where is the relay is the question all aftermarket radios now usually have the ability to operate power antennas so i doubt the signal...