I just wanted to share with everyone what an EXCELLENT job Great Plains Audio did on my Urei/Altec's! High quality work, and the parts are identical to original, they look great! The drivers were shipped back to me with the horns removed, and packed separately. They provided a glue to re-attach them, and that was a simple and quick procedure. The price was more than reasonable, and the work outstanding. I would not hesitate to send Great Plains Audio any of my drivers in the future!
I have also attached a picture of the Urei horn removed from the driver for those who are interested. I was not aware just how far down the throat this treatment actually went.
Cheers everyone, and thanks to Bill and his team at Great Plains Audio!