Sorry for bumping an old thread, but ive been working on something similar and have run into a slight snag. The radios i got have a piece of metal attached to the frame of the battery pack, and one of the screws holding the radio together passes through it. This means that if the casing is removed, the whole thing stops working because the circuit is incomplete. Ill try and upload some photos later tonight, but if anyone has suggestions on how to dissassemble a radio and attach it into the helmet, id love to hear!