I have seen some Heathkit HDP-121 mics sold that don't quite look the same. Some might be HDP-121A or maybe standard EV mics (not the ones sold through Heathkit). Some have the PTT switch on the base and some have it located on the vertical shaft. Q: Does anyone know if the switch can be relocated from either position to the other? I saw a reference in EV doc (not Heathkit doc) to their EV-719 mic about doing just that but not sure if it was limited to that mic or possible with all similar EV and Heathkit(EV) mics. Below a pic of the HDP-121 in question. Can the switch be moved from vertical to base (also swapping the Heathkit label)?