I sometimes joke about the rear visibility on the Hellcat, but looking at photos of the RL F6F-5 canopy the AH one seems pretty close. It lacks the blown canopy of aircraft like the Spitfire, which let the pilot get his eyes out beyond the rear bulkhead of the cockpit when checking six. Also the Hellcat has a big rear cockpit bulkhead. The rear windows featured on the F6F-3 would help matters, but I think if HTC were going to do that version, they would have done it when the F6F-5 was updated.