Whatever Happened to Full Boehm Clarinets?

I've worked on a lot of clarinets in the last 10 years, but admit to having a soft spot for the Full Boehm: the mechanism solves many technical issues, the tone tends to be fuller and darker (due to extra length and bore size), and, with the low Eb, they can do double duty for an A, thus saving that piddling $4k for another car! Finally, they were made as pro horns and are uniformly well constructed.

 So, why are they so little used and rarely made? The only company I'm aware of that still offers a standard production model is Amati, which wouldn't be my first choice, given the historical instruments available.... Buffet, Selmer, Leblanc, Malerne, Penzel Mueller, Kohlert, Conn, even Rampone all made Full Boehms at one time, most of them excellent instruments.

 Its hard to find a customer who has seen one, a tech who has worked on one, a fingering chart for one, or even a replacement case! What do you folks see as the pros and cons of these horns and do you have any idea why they are no longer readily available? Just asking....

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