"How accurate was the Gunpod on the F-4?"
I was an Technician on VASS at Brawdy servicing the Meteors & JPs in the mid - late 70's as well as setting up the targets, I also had the great pleasure to fly in Lady Clementine with Puddy & others towing target off the Cornish coast. Sadly I never got a Hunter ride as it went u/s while taxiing out on my next to last day at Brawdy.
Regarding the F4's gun, well all I can remember is that we ran a set of targets for them at Brawdy and only a few, bar one, returned with any damage, the exception were those shot to pieces by a certain F/L George Lee who was unknown to me at the time but of course then went onto win several major gliding championships (I later helped modify one of his gliders for the World's in Australia that he convincingly won) and almost bought his ex ASW-17.
I was truly privelidged to fly & work with Puddy, dropping the used flag at low level then accelerating around to drop a blue note over the airfield was awesome and utterly unforgettable. RIP Sir!