Danny, since the tube connectors are currently out of stock pending new production, maybe this is a good time to ask: any chance of retooling the mold for the jack side of the tube connectors to make say one of the ribbed sections in the outer plastic sleeve threaded in a common pitch rather than flat? I don't think it would interfere with the ability to press fit them in to a speaker cabinet considering the threads would just be additional ribs, with the benefit of gaining the ability to using a locking nut for just this kind of application.