@jinto i attach the ear to the helmet with flat head machine screws. i sink two holes into the ear, just deep enough for the head of the screw to go in, then hold it in place with some 5 minute epoxy. then drill matching holes through the helmet and hold it all together with a washer and acorn nuts. and to attach the rf to the stalk, i just drill two tiny holes through the stalk and match them up to the rf and hold it all together with a pair of 5/64" flat head screws. if you would like some pics of any of this to help understand it better just let me know.
Yea some pics would be nice