I have an old SPH-4, in great shape, other than an apparent short in the mic wiring. It is plenty comfortable for the short flights I take with the Foundation. Once our Huey is flying, I will be a crew chief and the flying opportunities will increase and reliability be more critical. Does anyone have a business to recommend troubleshooting and repairing the wiring, if necessary? The other option is converting my 1980s TACAIR helmet (HGU-2?). On the one hand I prefer that. But I would look the part of a Vietnam War Army crewman in the green SPH-4.