Deskpilot,
Don't know if he is still with us but there was a wyvern pilot based at Merimbula in the Nineties. Don was a Kiwi, flew Tempests during the war, test flew after mainly with Bristol and ended up a Classic Jumbo skipper with Singapore. He was semi retired, fishspotting and flying joyrides in a cessna in 95. Full of great stories. Can't remember his surname. Wall full of photos one of which was him in the wyvern. Bristol joined with Armstrong Siddeley which made the Python turboprop engine that powered some of the aircraft. Think that was how he came to fly it. If he is still around he would prob have the infomation you require.
Myself, I am going to build a WAR FW190. Last year on a Frankfurt trip a mate and I drove 3.5 hrs down to the FlugWerks factory where they are building real/replica 190's. Fantastic, seemed very friendly. Only the 600,000 odd euros stopped me buying one.