The tricky thing with considering these from a DIY standpoint at this time is that the really solidly-assembled ones would require major surgery for me to even "get at" the solder joints. Really I'll have to reserve that angle of inquiry until I have the luxury of destroying the existing assemblies. Of the ones where I was able to access that inner section, many of them even encase the soldered segment in a block of vinyl resin, which is literally not removable--so the only option is to throw away the plug.