Thanks Jemiba.
Since the above post, I've had an opportunity to look in the Fisher Papers in the Churchill Archives at Cambridge University.
I am wholly convinced that Incomparable was a Jackie Fisher "Own Design" with various versions over the years, none of which ever got very near a real designer, though there were some letters to and from Fisher after his resignation early in 1915, about 20in guns, while a rather similar concept is in Sir George Thurston's notebooks at the National Maritime Museum, offered as a battlecruiser concept design by Vickers to Japan in 1920. But Japan was quite able to do her own designs by then.
So, in short:
Incomparable was a fantastically fruitful source of speculation, other people's much later views on how it might have been made to work, reconstructed for WWII, converted to a carrier, etc etc,
Incomparable as a real design, beyond the lower picture in Triton's post, which Fisher himself described as "a rough sketch ... good enough for shore-going people to give them the idea" NOTHING