S-D, I believe the sky hooks were eventually found in stores and handed lock stock and barrel to the VTTS as any photo of 558 in the shed shows all properly equipped riggers.
On safety raisers, we also used them as aircrew to reach the H2S air valves and the copilot to inspect the intakes.
One Scampton co, at Akrotiri on a ranger, jacked the platform to the right level (rails down as it wouldn't fit otherwise) and pushed it up to the intakes. As the jack access door was open he sliced a neat cut in the intake lip.
Nowt said, bodge tape applied, and sortie flown. A skin repair and paint job and no one any the wiser back at Scampton.