[Graham Boak]

The Guyancourt operation wasn't 1943.

Unlike the K, however, the Hs was based on G-5 airframes, so were pressurised already. It seems to me that it wouldn't have been a great task for a prototype to block off the rear of the cockpit opening to seal it and permit the fitting of a standard Erla canopy. I don't recall mention of the G having anything other than a standard canopy, perhaps this is wrong. I don't say that this was done, just that it seems to be well within the capability of the prototype workshop shop. Something of a bodge rather than proper production standards.