I have a friend who had been to the Fitting Center in San Diego. He told me that he tried the new 913Hybrid in even numbers = 18 and 20 degrees and there were two sizes on the club. The normal head and then a smaller one.
But I can only see the "normal" hybrid at your website in the 17, 19, and 21° and no Hybrid in even degrees.
Was it a special Hybrid he tried in San Diego, or is the website not updated yet?