While I suspect there is quite a lot of fantasy in some of the 'might have been' reconstructions, I always thought there must have been potential to develop the FD2 into some sort of fighter, perhaps like
these?
My sole connection with the FD2 was sharing a retrieve car at Lasham once with the late Peter Twiss. Being rather 'British', the subject of his career as a test pilot and having once been the fastest man alive never came up in our conversation.