If AI can cough up an old furball of a topic then I can too ! Surely somebody has some old Dagger bits used as a doorstop.

Here’s an assembly of hook anchor points with micarta ‘fish plate’, hook arm with damper attachment, spring damper. All this stuff does not have dH serial numbers, nor is there an Illustrated Parts Manual. Laying upside  down under the Sea Hurricane at Shuttleworth, to disproving frowns, and crawling through the Sea Hornet rear fuselage remains at the always welcoming dH Museum, crawling through shipping containers at always welcoming Avspecs allowed a forensic reconstruction of bits and pieces collected from many locations. The remains of an internal fuselage strake are shown under the fuselage of DZ542 in NZ. The stainless steel hook retention mechanism did have dH serial numbers, which indicates forward planning for the postwar Sea Mosquito design. 

This photo shows a number of heavy duty ‘mystery clips’ found across numerous known ‘buried Highball Mosquito’ sites in the Narromine area of NSW. I have yet to identify their application, but ‘definitely somewhere on or something to do with a Highball Mosquito’ Beneath them, in ‘Highball Blue’, which the undersides and, I believe interior cradle bomb-bay area, is the lower windscreen framing of the armoured windscreen. These have a standard 5c switch fitted, which I guess had something to do with arming, as it was handy for the Navs left hand to reach while the right hand rested on the sight cradle and fooled with the Barnes Wallis sight. The sight cradle remains of DZ543 confirm that the common image of a ‘boat in sight’ was the aiming method used in 1943-5. Above this is a bank of three lights, that the circuit diagrams suggest was to confirm fusing and release. 

I thought it would be good to update this thread, for the record. In 2020, just before Covid, I was fortunate to get to the RAF Hendon Museum archives, where a helpful staff member and fortuitous flicking through the card catalogue identified original Vickers drawings of the Highball setup, both original 1943 era wind turbine driven version and later hydraulic driven version that were designed for Sea Hornet use. I also visited the superb deHavilland Museum in Herts where the Highball cradle and sighting arm remains from DZ543, ex Yorkshire were displayed, as well as a practice Highball from Loch Striven. These artifacts were matched to drawings and many pictures and vernier measurements taken to allow accurate CAD drawings to be reconstructed. I had previously visited NZ to look at cradle attachment remains held and kindly made accessible by Avspecs, associated with DZ542. In Australia, the remains of DZ546, which had been reduced to pieces, but carefully kept in an old shed by the original farmer owners, were found and catalogued, as well as the remains of other Highball Mosquitos recovered from the Narromine area. All of these artifacts, from the UK, Australia and NZ, as well as the original drawings, constituted jigsaw pieces that could now be fitted into a whole. There are elements of the cradle mechanism still missing, being the guts of the turbine, governor and release arms, so the next focus was digging up the airfield dump, on the theory that the fitters may have disposed off unserviceable components, or, even better, in a rush to go home in 1945, had lazily gas axed a complete cradle in half and just buried it. Covid stopped things for a few years, though. Pictured is the original glazed nose from DZ546. This aircraft was most definitely fitted with half inch thick armour plate across the entire cross section of the front, as this original item remained with DZ546. It was not possible for the Nav to access the front as a usual bomber variant would allow. I wondered ‘why keep the nose glazing then?’. The simple answer is expediency, as the geometry of a glazed nose is different to that of a FB aluminium nose, when you put them side by side. In 1943, there was no time or real need to make a custom nose for an adapted B. I have seen in circuit diagrams and footage how a ‘release flash’ was fitted in the nose, to cue moment of drop in 1943 trials, so the glazing was practically used. Full frontal armour, covering both crew members, including an armoured glass windscreen, was the only thing the conscience of the designers and morale of the crew relied on, when the centrifugal spinning of two Highballs would ‘lock’ the aircraft in a straight line, while looming larger in the sights of anti aircraft gunners. 

It would be a great chart to find and share, indeed. DH was licence built Hamilton Standard. There are some ‘thin’ interchangeablability columns in HS literature, from memory.