Fine business, old man! Thanks. Undoubtedly JohninCR is following this thread , here, and I just want to say that the pic of those dipole wave guides are a thing of beauty, functionally, artistically, and conceptually. Freakin' awesome! Have you posted those pics here in AC? I don't recall seeing them in finished form. I have a feeling that with phase plugs, and a line level correction circuit specifically designed for those, you'd have an incredably good sounding system worthy of commercial success.